Yamaha WR450F (2009) manual

5TJ-28199-46 WR450F(Y) PRINTED IN JAPAN 2008.06-1.7 × 1 CR (E,F,G,S) OWNER’S SERVICE MANUAL MANUEL D’ATELIER DU PROPRIETAIRE FAHRER- UND WARTUNGSHANDBUCH MANUAL DE SERVICIO DEL PROPIETARIO Il convient de lire attentivement ce manuel avant la première utilisation du véhicule. Read this manual carefully before operating this vehicle. Bitte les[...]

Read this manual carefully b efore operating this vehicle. This manual should stay with this vehicle if it is sold. Il convient de lire attentivement ce manuel avant la première utilisation du véhicule. Le manuel doit étre remis avec le véhicu le en cas de vente de ce dernier. Bitte lesen Sie diese Bedienu ngsanleitung sorgfältig durch, bevor [...]

WR450F(Y) WR450F(Y) 2009 2009 5TJ-28199-46-E0 5TJ-28199-46-E0 OW NER’S SERVICE MANUAL OW NER’S SERVICE MANUAL Read this manual carefully before operating this vehicle. Read this manual carefully before operating this vehicle.[...]

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WR450F(Y) OWNER'S SERVICE MANUAL ©2008 by Yamaha Motor Co., Ltd. 1st Edition, June 2008 All rights reserved. Any reprin ting or unauthorized use wi thout the written permission of Yamaha Motor Co., Ltd. is expressly prohib ited. Printed in Japan[...]

FOREWORD INTRODUCTION Congratul ations on your pu rchase of a Yamaha WR series. This model is the culmination of Yamaha' s vast ex- perience in the production of paceset- ting racing machines. It represents the highest grade of craftsmanship and reliability that have made Yama- ha a leader. This manual explain s operation, in- spection, basic [...]

• PROPERLY SECURE THE MA- CHINE BEFORE TRANSPORTING IT. When transporting the machine in another vehicle, alwa ys be sure it is properly secured and in an upright position and that the fuel cock is in the "OFF" position. Otherwise, fuel may leak out of the carburetor or fuel tank. F.I.M. MACHINE WEIGHTS (Except for Canada) Weights of ma[...]

HOW TO READ DESCRIPTIONS To help identify parts and clarify pro- cedure steps, there are exploded dia - grams at the start of each removal and disassembly section. 1. An easy-to-see exploded diagram "1" is provided for removal and disassembly jobs. 2. Numbers "2" are given in the or- der of the jobs in the exploded di- agram. A [...]

TABLE OF CONTENTS GENERAL INFORMATION 1 SPECIFICATIONS 2 REGULAR INSPECTION AND ADJUSTMENTS 3 TUNING 4 ENGINE 5 CHASSIS 6 ELECTRICAL 7[...]

CONTENTS CHAPTER 1 GENERAL INFOR- MATION DESCRIPTION ................. 1-1 MACHINE IDENTIFICATION ............. 1-2 INCLUDED PARTS .......... 1-2 IMPORTANT INFORMATION................. 1-2 CHECKING OF CONNECTION .................. 1-3 SPECIAL TOOLS ............. 1-4 CONTROL FUNCTIONS .. 1-8 MULTI-FUNCTION DISPLAY .......................... 1-9 STAR[...]

1-1 DESCRIPTION GENERAL INFORMATION DESCRIPTION • The machine you have purchased may differ slightly from those shown in the following. • Designs and specifications are subject to chang e without notice. 1. Clutch lever 2. Hot starter lever 3. Engine stop switch 4. Multi-function displ ay 5. Main switch 6. Start switch 7. Front brake lever 8. T[...]

1-2 MACHINE IDENTIFICATION MACHINE IDENTIFICATION There are two signifi cant reasons for knowing the serial number of your machine: 1. When ordering parts, you can give the number to your Yamaha dealer for positive identification of the model you own. 2. If your machine is stolen, the au- thorities will need the number to search for and identify yo[...]

1-3 CHECKING OF CONNECTION 4. During the machine disassembly, clean all parts and place them in trays in the order of disassembly. This will speed up assembly ti me and help assure that all p arts are correctly reinstalled. 5. Keep away from fire. ALL REPLACEMENT PARTS 1. We recommend to use Yamaha genuine parts for all replace- ments. Use oil and/[...]

1-4 SPECIAL TOOLS SPECIAL TOOLS The proper spe cial tools are necessary for complet e and accura te tune-up and asse mbly. Using the correct sp ecial tool will help prevent damage caused by the use of improper too ls or improvised techniques . The shape an d part number used fo r the special tool differ by coun try, so two types are provided. Refer[...]

1-5 SPECIAL TOOLS Damper rod holder YM-01494, 90890-01494 Use this tool to remove and install the damper rod. Fork seal driver YM-A0948, 90890-01502 This tool is used when install th e fork oil seal. Spoke nipple wrench YM-01521, 90980-01521 This tool is used to tighten the spoke. Sheave holder YS-1880-A, 90890-01701 This tool is used for when loos[...]

1-6 SPECIAL TOOLS Valve spring compressor YM-4019, 90890-04019 This tool is needed to remove and install the valve assembl ies. Clutch holding tool YM-91042, 90890-04086 This tool is used to hold the clutch when removing or installing th e clutch boss securing nut. Valve guide remover Intake 4.5 mm (0.18 in) Exhaust 5.0 mm (0.20 in) YM-4116, 90890-[...]

1-7 SPECIAL TOOLS Dynamic spark tester YM-34487 Ignition checker 90890-06754 This instrument is necessary for checking the ignition system compo- nents. Vacuum/pressure pump gaug e set YB-35956-A, 90890-06756 This tool is used to check the air in- duction system. Digital tachometer YU-39951-B, 90890-0676 0 This tool is needed for observing en- gine[...]

1-8 CONTROL FUNCTIONS CONTROL FUNCTIONS MAIN SWITCH Functions of the respective switch po- sitions are as follows: ON: The engine can be started only at this position. OFF: All electrical circuits are switched off. Main switch indicator light The main switch "1" is equipped with an indicator light "2" to avoid forget- ting to tu[...]

1-9 MULTI-FUNCTION DISPLAY COLD STARTER KNOB When cold, the engine requires a richer air-fuel mixture for starting. A separate starter circuit, which i s con- trolled by the cold starter knob "1", supplies this mixture. Pull the cold starter knob out to open the circuit for starting. When the engine has warmed up, push it in to close the [...]

1-10 MULTI-FUNCTION DISPLAY Changing odomete r and tripmeter A/B (TRIP A/B) 1. Push the "SLCT2" button to change the tripmeter display. The display will change in the follow- ing order: Odometer → TRIP A → TR IP B → TRIP A → Odometer. To reset the digits, se lect the tripme- ter involved and push the "RST" but- ton for 2[...]

1-11 MULTI-FUNCTION DISPLAY Auto start 1. Check that changeover has been made to RACE MODE. (Refer to "Changeover from BASIC MODE to RACE MODE".) 2. Make the machine ready for a run by pushing the "SLCT1" button for 2 seconds or more. When the measurement is made ready for a run by auto start, and will start flashing. Timer disp[...]

1-12 MULTI-FUNCTION DISPLAY FUNCTION DIAGRAM A short push on the button changes the operation in the arrowed direction. A short push on the button changes the operation in both arrowed directions. A long push on the button changes the operation in the arrowed direction. A long push on the button changes the operation in both arrowed directions. Met[...]

1-13 MULTI-FUNCTION DISPLAY The following diagram illustrates th e multi-function display rega rding the direction and operation condition in- volved in each of its functions. A. A short push on the button changes the operation i n the ar- rowed direction. B. A short push on the button changes the operation i n both arrowed di rections. C. A long p[...]

1-14 STARTING AND BREAK-IN STARTING AND BREAK-IN FUEL Always use the recommended fuel as stated below. Also, be sure to use new gasoline. Use only unleaded gaso line. The use of leaded g asoline will cause severe damage to the engi ne inter- nal parts such as valv es, piston rings, and exhaust system, etc. If knocking or pingi ng occurs, use a diff[...]

1-15 STARTING AND BREAK-IN The engine fails to start Pull the hot starter lever all the way out and while holding the lever, kick the kickstarter crank 10 to 20 times to clear the engine. Then, re start the en- gine. Refer to "Restarting an engine after a fall". Observe the fo llowing break-in procedures during ini tial opera tion to ensu[...]

1-16 TORQUE-CHECK POINTS TORQUE-CHECK POINTS Concerning the tightening torque, refer to "TIGHTENING TORQUES" section in the CHAPTER 2. Frame construction Frame to rear frame Combined seat and fuel tank Fuel tank to frame Exhaust system Silencer to rear frame Engine mounting Frame to engine Engine bracket to engine Engine bracket to frame [...]

1-17 CLEANING AND STORAGE CLEANING AND STORAGE CLEANING Frequent cleaning of your machine will enhance its appe arance, maintain good overall perfo rmance, and ex- tend the life of many components. 1. Before washing the machine, block off the en d of the exhaust pipe to prevent water from enter- ing. A plastic bag secured with a rubber band may be [...]

2-1 GENERAL SPECIFICATIONS SPECIFICATIONS GENERAL SPECIFICATIONS Model name: WR450FY (USA, CDN, AUS, NZ) WR450F (EUROPE, ZA) Model code number: 5TJN (USA) 5TJP (CDN) 5TJR (EUROPE) 5TJS (AUS, NZ, ZA) Dimensions: USA, CDN, ZA EUROPE AUS, NZ Overall length 2,175 mm (85.63 in) 2,200 mm (86.61 in) 2,190 mm (86.22 in) Overall width 825 mm (32.48 in) ←?[...]

2-2 GENERAL SPECIFICATIONS (Except for USA and CDN) SAE10W-30, SAE10W-40, SAE15W-40, SAE20W-40 or SAE20W-50 API service SG type or higher, JASO standard MA Oil capacity: Engine oil Periodic oil change 0.95 L (0.84 Imp qt, 1.00 US qt) With oil filter replacement 1.0 L (0.88 Imp qt, 1.06 US qt) Total amount 1.2 L (1.06 Imp qt, 1.27 US qt) Coolant cap[...]

2-3 MAINTENANCE SPECIFICATIONS MAINTENANCE S PECIFICATIONS ENGINE Tire: Type With tube Size (front) 80/100-21 51M (USA, CDN, ZA) 90/90-21 54R (EUROPE, AUS, NZ) Size (rear) 110/100-18 64M (U SA, CDN, ZA) 130/90-18 69R (EU ROPE, AUS, NZ) Tire pressure (front and rear) 100 kPa (1.0 kgf/cm 2 , 15 psi) Brake: Front brake type Single disc brake Operation[...]

2-4 MAINTENANCE SPECIFICATIONS Camshaft: Drive method Chain drive (Left) ---- Camshaft cap inside diameter 22.000–22.021 mm (0.8661–0.8 670 in) ---- Camshaft outside diameter 21.959–21.972 mm (0.8645–0.8 650 in) ---- Shaft-to-cap clearance 0.028–0.062 mm (0.0011 –0.0024 in) 0.08 mm (0.003 in) Cam dimensions Intake "A" 3 0.1 00[...]

2-5 MAINTENANCE SPECIFICATIONS "B" face width (IN) 2.26 mm (0.089 in) ---- "B" face width (EX) 2.26 mm (0.089 in) ---- "C" seat width (IN) 0.9–1.1 mm (0.0354–0.0433 in) 1.6 mm (0.0630 in) "C" seat width (EX) 0.9–1.1 mm (0.0354–0.043 3 in) 1.6 mm (0.0630 in) "D" margin thickness (IN) 1 mm (0.[...]

2-6 MAINTENANCE SPECIFICATIONS Set length ( valve closed ) (IN) 27.87 mm (1.10 in) ---- Set length ( valve closed ) (EX) 28.38 mm (1.12 in) ---- Compressed force (installed) (IN) 13 0.2–149.8 N at 27. 87 mm (13.28–15.28 kg at 27.87 mm, 29.27–33.68 lb at 1.10 in) ---- Compressed force (installed) (EX) 12 3.1–141.7 N at 28. 38 mm (12.55–14.[...]

2-7 MAINTENANCE SPECIFICATIONS Type Taper ---- Dimensions (B × T) 1.00 × 3.35 mm (0.04 × 0.13 in) ---- End gap (installed) 0.35–0.50 mm (0 .014–0.020 in) 0.85 mm (0.033 in) Side clearance 0.020–0.055 mm (0 .0008–0.0022 in) 0.12 mm (0.005 in) Oil ring: Dimensions (B × T) 2.0 × 2.9 mm (0.08 × 0.11 in) ---- End gap (installed) 0.2–0.5 [...]

2-8 MAINTENANCE SPECIFICATIONS Shifter: Shifter type Cam drum and guide bar ---- Guide bar bending limi t ---- 0.05 mm (0.002 in) Kickstarter: Type Ratchet type ---- Carburetor: USA, CDN, AUS, NZ, ZA EUROPE I. D. mark 5TJE E0 5TJL L0 ---- Main jet (M.J) #162 #160 ---- Main air jet (M.A.J) ø2.0 ← ---- Jet needle (J.N) NFNT NNHU ---- Cutaway (C.A)[...]

2-9 MAINTENANCE SPECIFICATIONS CHASSIS Item Sta ndard Limit Steering system: Steering bearing type Taper roller bearing ---- Front suspension: USA, CDN EUROPE, AUS, NZ, ZA Front fork travel 300 mm (11.8 in) ← ---- Fork spring free length 460 mm (18.1 in) ← 455 mm (17.9 in) Spring rate, STD K = 4.5 N/mm (0.459 kg/ mm, 25.7 lb/in) ← ---- Option[...]

2-10 MAINTENANCE SPECIFICATIONS ELECTRICAL Drive chain: Type/manufacturer DID520VM/DAIDO ---- Number of links 113 links + joint ---- Chain slack 48–58 mm (1.9–2.3 in) ---- Chain length (15 links) ---- 239.3 mm (9.42 in) Front disc brake: Disc outside dia. × Thickness 250 × 3.0 mm (9.84 × 0.12 in) 250 × 2.5 mm (9.84 × 0.10 in) Pad thickness[...]

2-11 MAINTENANCE SPECIFICATIONS Charging system: System type AC magneto ---- Model (stator)/manufacture r 5TJ 50/YAMAHA ---- Normal output 14 V/120 W at 5,000 r/min ---- Charging coil resistance (color) 0.288–0.432 Ω at 20 °C (68 °F) (White–Ground) ---- Lighting coil resistance (color) 0.224–0.336 Ω at 20 °C (68 °F) (Yellow–Ground) --[...]

2-12 TIGHTENING TORQUES TIGHTENING TORQUES ENGINE △ - marked portion shall be checked for torque ti ghtening after brea k-in or before each race. *1: Tighten the cylinder head bo lts to 30 Nm (3.0 m•kg, 22 ft•l b) in the prop er tightening sequence, remove and retighten the cylinder head bolts to 20 Nm (2.0 m•kg, 14 ft•lb) in the proper t[...]

2-13 TIGHTENING TORQUES Radiator pipe 1, 2 M10 × 1.0 2 10 1.0 7.2 Impeller M8 × 1.25 1 14 1.4 10 Water pump housing cover M6 × 1.0 3 10 1.0 7.2 Coolant drain bol t M6 × 1.0 1 10 1.0 7.2 Oil pump cove r M4 × 0.7 1 2 0.2 1.4 Oil pump M6 × 1.0 2 10 1.0 7.2 Oil pump drive gear sha ft M6 × 1.0 1 10 1.0 7.2 Engine oil drain bolt (oil filter) M6 ×[...]

2-14 TIGHTENING TORQUES CHASSIS △ - marked portion shall be checked for torque ti ghtening after brea k-in or before each race. Part to be tightened Thread size Q'ty Tightening torque Nm m•kg ft•lb △ Upper bracket and outer tube M8 × 1.25 4 21 2.1 15 △ Lower bracket and outer tube M8 × 1.25 4 21 2.1 15 △ Upper bracket and steeri [...]

2-15 TIGHTENING TORQUES △ Driven sprocket and wheel hub M8 × 1.25 6 50 5.0 36 △ Nipple (spoke) — 72 3 0.3 2.2 △ Disc cover and rear brake caliper M6 × 1.0 2 10 1.0 7.2 △ Protector and rear brake calip er M6 × 1.0 2 7 0.7 5.1 Chain puller adjust bolt and locknut M8 × 1.25 2 19 1.9 13 Engine mounting: △ Engine uppe r bracket and frame[...]

2-16 TIGHTENING TORQUES 1. First, tighten the steering ring nut app roximately 38 Nm (3.8 m•kg, 27 ft•l b) by using the steerin g nut wrench, then loosen the steering ring nut one turn. 2. Retighten the steering ring nut 7 Nm (0.7 m•kg, 5.1 ft•lb). ELECTRICAL Tighten the rotor nut to 65 Nm (6.5 m•k g, 47 ft•lb), loose n and retighten th[...]

2-17 TIGHTENING TORQUES GENERAL TORQUE SPECIFICA TIONS This chart specifies torque for stan- dard fasteners with standard I.S.O. pitch threads. Torque specifications for special components or assem- blies are included in the applicable sections of this book. To avoid warpage, tighten multi-fastener as- semblies in a crisscr oss fashion, in progress[...]

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2-18 LUBRICATION DIAGRAMS LUBRICATION DIAGRAMS 1. Oil filter element 2. Oil pump 3. Drive axle 4. Main axle 5. Crankshaft 6. Connecting rod A. From cylinder B. To oil tank[...]

2-19 LUBRICATION DIAGRAMS 1. Intake camshaft 2. Exhaust camshaft A. To main axle B. From oil pump[...]

2-20 CABLE ROUTING DIAGRAM CABLE ROUTING DIAGRAM 1. Fuel tank breather hose 2. Clamp 3. Diode 4. Hot starter cable 5. Throttle position sensor lead 6. Wire harness 7. Hump (frame) 8. Negative battery lead 9. Starter motor lead 10. Neutral switch le ad 11. AC magneto lead 12. Brake hose 13. Rectifier/regulator lead 14. Carburetor breather hose 15. C[...]

2-21 CABLE ROUTING DIAGRAM A. Insert the end of the fuel ta nk breather hose into the hole in the steering stem. B. Fasten the throttle cable, hot starter cable and rectifier/regula - tor lead onto the frame. Locate the clamp ends under the throt- tle cable, and after clamping, leave the other end as is and do not cut it. C. Fasten the diode (at th[...]

2-22 CABLE ROUTING DIAGRAM 1. Throttle cable (pull) 2. Throttle cable (return) 3. Catch tank hose 4. Ignition coil 5. Clamp 6. Air induction hose (air cut-off valve - rear of cylinder he ad) 7. Catch tank breather hose A. Cross the pull and push throttle cables. B. Fasten the catch tank ho se and air induction hose (air cut-off valve-rear of cylind[...]

2-23 CABLE ROUTING DIAGRAM 1. Brake ma ster cylinder 2. Brake hose holder 3. Brake ho se A. Install the brake hose so that its pipe portion directs as shown and lightly touche s the projec- tion on the brake caliper. B. Pass the brake hose into the brake hose holders. C. If the brake hose contacts the spring (rear shock absorber), correct its twist[...]

2-24 CABLE ROUTING DIAGRAM 1. Clamp 2. Positive battery lead 3. Battery 4. Negative battery lead 5. Taillight coupler 6. CDI unit coupler (6-pin) 7. CDI unit coupler (3-pin) 8. CDI unit coupler (6-pin) A. Fasten the wire harness to th e upper engine bracket (left side). Locate the clamp end fa cing to- ward the upper side of the frame with the tie [...]

2-25 CABLE ROUTING DIAGRAM E. Connect the wire harness to the starter relay. F. Fasten the catch tank breather hose and catch tank hose to the rear frame. Clamp them close to where they are joined to the frame. Fasten the pipe tightly enough not to crush it. Locate the clamp end facing towa rd the rear of the frame with the tie end facing downward.[...]

2-26 CABLE ROUTING DIAGRAM 1. Throttle cable 2. Clamp 3. Brake ho se 4. Clutch cable 5. Hose guide 6. Main switch coupler 7. Wire harness 8. Headlight coupler 9. Hot starter cable 10. Multi-function displ ay bracket 11. Main switch 12. Upper bracket 13. Clutch switch coupler 14. Engine stop switch coupler 15. Multi-function display cou pler 16. Sta[...]

2-27 CABLE ROUTING DIAGRAM D. Secure the coupl er by inserting it into the multi-function display bracket. E. Pass the throttle cables, clutch cable and hot starter cable be- tween the upper bracket and multi-function displ ay bracket. F. Fasten the multi-function display leads to the bracket. Cut off the tie end. G. Secure the coupler by pushing i[...]

3-1 PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL SYSTEM (For Canada) REGULAR INSPECTION AND ADJUSTMENTS PERIODIC MAINTENANCE CHART FO R THE EMISSION CONTRO L SYSTEM (For Canada) • From 4,200 mi (7,000 km) or 9 months, repeat the maintenanc e interva ls starting from 1,800 mi (3,000 km) or 3 months. • Items marked with an asterisk should [...]

3-2 GENERAL MAINTENANCE AND LUBRICATION CHART (For Canada) GENERAL MAINTENANCE AND LUBRI CATION CHART (For Canada) No. ITEM CHECKS AND MAINTENANCE JOBS INITIAL ODOMETER READINGS 600 mi (1,000 km) or 1 month 1,800 mi (3,000 km) or 3 months 3,000 mi (5,000 km) or 6 months 1 Clutch Check operation. √√√ Adjust or repla ce cable. 2 * Co oling syst[...]

3-3 MAINTENANCE INTERVALS FOR COMPETITION USE • The air filter needs more frequent service if you are riding in un usually wet or dusty areas. • Hydraulic brake service • After disassemblin g the brake master cylinders and calipers, always change the fluid. Reg ularly check the brake fluid levels and fill the reservoirs as required. • Every[...]

3-4 MAINTENANCE INTERVALS FOR COMPETITION USE Replace ● CAMSHAFTS Inspect the camshaft surface. Inspect ● Inspect the decompression system. Replace ● CAMSHAFT SPROCKETS Inspect ● Check for w ear on the teet h and for damage. Replace ● PISTON Inspect ●● Inspect crack. Clean ● Inspect carbon deposits a nd eliminate them. Replace ● P[...]

3-5 MAINTENANCE INTERVALS FOR COMPETITION USE CARBURETOR Inspect, adjust and clean ●● SPARK PLUG Inspect and clean ●● Replace ● DRIVE CHAIN Use chain lube. Lubricat e, slack, alignmen t ●● Chain slack: 48–58 mm (1.9–2.3 in) Replace ● COOLING SYSTEM Check coolant leve l and leakage ●● Check radiator cap operation ● Replace [...]

3-6 MAINTENANCE INTERVALS FOR COMPETITION USE FRONT FORK OIL SEAL AND DUST SEAL Clean and lube ●● Li thium base grease PROTECTOR GUIDE Replace ● REAR SHOCK ABSORBER Inspect and adjust ●● Lube ● (After rain ride) ● Molybdenum disulfide grease Retighten ●● DRIVE CHAIN GUIDE AND ROLLERS Inspect ●● SWINGARM Inspect, lube and retig[...]

3-7 PRE-OPERATION INSPECTION AND MAINTENANCE PRE-OPERATION INSPECTION AND MAINTENANCE Before riding for break-in operation or practice, make sure the machine is in goo d operating condition. Before using this machine, ch eck the following points. GENERAL INSPECTION AND MAINTENANCE Item Routine Page Coolant Check that coolant is fill ed up to the ra[...]

3-8 ENGINE ENGINE REMOVING THE SEAT, FUEL TANK AND SIDE COVERS Order Part name Q'ty Remarks Turn the fuel cock to "OFF". Disconnect the fuel hose. 1S e a t 1 2 Air scoop (left and right) 2 3 Bolt (fuel tank) 2 4 Fuel tank 1 5 Left side cover 1 Open the air filter case cover. 6 Right side cover 1 Refe r to removal section. 7 Headlight[...]

3-9 ENGINE REMOVING THE SIDE COVER 1. Remove: • Bolt (side cover) • Right side cover "1" Draw the side cover backward to re- move it because its claw "a" is insert- ed in the air filter case.[...]

3-10 ENGINE REMOVING THE EXHAUST PIPE AND SILENCER Order Part name Q'ty Remarks Right side cover Refer to "REMOVING THE SEAT, FUEL TANK AND SIDE COVERS" section. 1 Bolt (silencer clamp) 1 Onl y loosening. 2 Bolt [silencer (front)] 1 3 Bolt [silencer (rear)] 1 4 Collar 1 5 Silencer 1 6 Silencer clamp 1 7 Nut (exhaust pipe) 1 8 Bolt (e[...]

3-11 ENGINE CHECKING THE SILENCER AND EXHAUST PIPE 1. Inspect: • Gasket "1" Damage → Replace. INSTALLING THE SILENCER AND EXHAUST PIPE 1. Install: • Gasket • Exhaust pipe "1" • Nut (exhaust pipe) "2" • Bolt (exhaust pipe) "3" First, temporarily tighten the nut (ex- haust pipe), then tighten the bo[...]

3-12 ENGINE Handling note s of coolant: The coolant is harmful so it should be handled with sp ecial care. • When coola nt splashes to your eye. Thoroughly wash your eye wi th water and see your do ctor. • When coola nt splashes to your clothes. Quickly wash it away with water and then with soap. • When cool ant is swallowed . Quickly make hi[...]

3-13 ENGINE 2. Adjust: • Throttl e grip free play Throttle grip free play adjus tment steps: a. Slide the adjuster cover. b. Loosen the locknut "1". c. Tu rn the adjuster "2" until the specified free play is obtained. d. Tighten the lockn ut. Before adjusting the th rottle cable free play, the engine idle speed should be adjus[...]

3-14 ENGINE 5. Inspect: • Air filter element Damage → Replace. 6. Apply: • Foam-air-filter oil or equivalent oil to the el ement • Squeeze out the e xcess oil. Ele- ment shoul d be wet but not drip- ping. • Wipe off the oil left on the element surface using a clean dry cloth. (Ex- cess oil in the element may ad- versely affect engine star[...]

3-15 ENGINE 5. Start the engine and let it warm up for several minutes. When the oil tank is empty, never start the engine. 6. Idle the engine more than 10 se c- onds while keepin g the machine upright. Then sto p the engine and add the oil to the maximum level. 7. Install: • Oil tank cap CHANGING THE ENGINE OIL 1. Start the engine and let it war[...]

3-16 ENGINE ADJUSTING THE PILOT SCREW (For EUROPE) 1. Adjust: • Pilot screw "1" Adjustme nt steps: To optimize the fuel flo w at a smaller throttle opening, e ach machine's pilot screw has been individuall y set at the factory. Before adju sting the pilo t screw, turn it in fully and count the number of turns. Record this number as[...]

3-17 ENGINE 5. Adjust: • Valve clearance Adjustme nt steps: a. Remove the camshaft (intake and exhaust). Refer to "CAMSHAFTS" section in the CHAPTER 5. b. Remove the valve lifters "1" and the pads "2". • Place a rag in the timing chain space to prevent pads from falling into the crankcase. • Identity each valve l[...]

3-18 ENGINE INTAKE EXHAUST[...]

3-19 CHASSIS CLEANING THE SPARK ARRESTER (For USA) • Be sure the exhaust pipe and si- lencer a re cool before cleaning the spark arre ster. • Do not sta rt the engine whe n cleaning the exhaus t system. 1. Remove: • Screw (silencer ca p) "1" 2. Remove: • Bolt (spark arrester) "1" 3. Remove: • Tail pipe "1" ?[...]

3-20 CHASSIS 2. Remove: • Brake lever cover 3. Adjust: • Brake lever position Brake lever position adjustment steps: a. Loosen the locknut "1". b. Turn the adjusti ng bolt "2" until the lever position "a" is within speci- fied position. c. Ti ghten the locknut. Be sure to tighten the locknut, as it will cause poor [...]

3-21 CHASSIS i. Insta ll the brake caliper "8" and tighten the pad pin "9". j. Insta ll the pad pin plug "10". 3. Inspect: • Brake fluid level Refer to "CHECKING THE BRAKE FLUID LEVEL" section. 4. Check: • Brake lever operation A softy or spongy feeling → Bleed brake system. Refer to "BLEEDING THE [...]

3-22 CHASSIS 3. Inspect: • Brake fluid level Refer to "CHECKING THE BRAKE FLUID LEVEL" section. 4. Check: • Brake pedal operation A softy or spongy feeling → Bleed brake system. Refer to "BLEEDING THE HY- DRAULIC BRAKE SYSTEM" sec- tion. CHECKING THE REAR BRAKE PAD INSULATOR 1. Remove: • Brake pad Refer to "CHECKING[...]

3-23 CHASSIS 6. Install: • Chain joint "1" • O-ring "2" • Drive chain "3" • Link plate "4" When installing th e drive chain, apply the lithium soap base grease on th e chain joint and O-rings. 7. Install: • Link plate • Press the link plate onto the chain joint using a drive chain riveter "5&[...]

3-24 CHASSIS RELIEVING THE FRONT FORK INTERNAL PRESSURE If the front fork in itial movement feels stiff during a run, reli eve the front fork internal pressure. 1. Elevate the front wheel by placing a suitable stand under the engine. 2. Remove the air bleed screw "1" and release the internal pressure from the front fork. 3. Install: • A[...]

3-25 CHASSIS 4. Adjust: • Spring preload Adjustme nt steps: a. Loosen the locknut "1". b. Loosen the adjuster "2" until there is some clearance between the spring and adjuster. c. Measure the spring free le ngth "a". d. Turn the adjuster "2". • Be sure to remove all dirt and mud from around the locknut an[...]

3-26 CHASSIS ADJUSTING THE REAR SHOCK ABSORBER HIGH COMPRESSION DAMPING FORCE 1. Adjust: • High compression damping force By turning the adjuster "1". • STANDARD POSITION: This is the position which is back by the specific number of turns from the fully turned-in position. (Which align the punch mark "a" on the adjuster with[...]

3-27 CHASSIS 4. Adjust: • Steering ring nut Steering ring nut adjustment steps: a. Remove the headlight. b. Remove the handlebar a nd upper bracket. c. Lo osen the steering ring nut "1" using the steering nut wrench "2 ". d. Tighten the steering ring nut "3" using steering nut wrench "4". • Apply the lith[...]

3-28 CHASSIS LUBRI CATION To ensure smooth operation of all components, lubricate your machine during setup, afte r break-in, and after every ride. 1. All control cable 2. Clutch lever pivot 3. Shift pedal pivot 4. Footrest pivot 5. Throttle-to-handlebar contact 6. Drive chain 7. Tube guide ca ble winding por- tion 8. Throttle cable end 9. Clutch c[...]

3-29 ELECTRICAL ELECTRICAL CHECKING THE SPARK PLUG 1. Remove: • Spark plug 2. Inspect: • Electrode "1" Wear/damage → Replace. • Insulator color "2" Normal condition is a medium to light tan color. Distinctly different color → Check the engine condition. When the engine runs for many hours at low speeds, the spark plug [...]

3-30 ELECTRICAL 3. Remove: • Battery band •B a t t e r y 4. Measure: • Battery charge Measurement steps: a. Connect a pocket tester "1" to the battery terminals. • The charge state of an MF battery can be checked by measuring its open-circuit voltage (i.e., the vol t- age when the positive terminal is disconnected). • No chargin[...]

3-31 ELECTRICAL Charging method using a variabl e voltage charger[...]

3-32 ELECTRICAL Charging method usin g a constant voltage charger[...]

3-33 ELECTRICAL 6. Install: •B a t t e r y • Battery band 7. Connect: • Battery leads (to the batte ry terminals) First, connect the positiv e lead "1", then the negative lead "2". 8. Check: • Battery terminals Dirt → Clean with a wire brush. Loose connection → Connect properly. 9. Lubricate: • Battery terminal 10.[...]

3-34 ELECTRICAL ADJUSTING THE HEADLIGHT BEAMS 1. Adjust: • Headlight beam (ve rtically) Adjusting steps: a. Turn the adjusting screw "1" in di- rection "a" or "b". Direction "a" Headlight beam is raised. Direction "b" Headlight beam is lowered.[...]

4-1 ENGINE (Except for Canada) TUNING ENGINE (Except for Canada) CARBURETOR SETTING • The air/fuel mixture will vary de- pending on atmospheric conditi ons. Therefore, it is necessary to take into consideration the air pressure, ambient temperature, hu midity, etc., when adjusting the carburetor. • Perform a test run to check for prop- er engin[...]

4-2 ENGINE (Except for Canada) ADJUSTING THE PILOT JET The richness of the air-fuel mixtu re with the throttle open 1/4 or less can be set by adjusti ng the pilot jet "1". Effects of adjusting the pilot jet (reference) A. Idle B. Fully open 1. #48 2. #42 3. #45 ADJUSTING THE JET NEEDLE GROOVE POSITION Adjusting the jet needl e "1&quo[...]

4-3 ENGINE (Except for Canada) CARBURETOR SETTING PARTS Main jet Size Part number (-14943-) Rich #185 4MX-44 #182 4MX-94 #180 4MX-43 #178 4MX-93 #175 4MX-42 #172 4MX-92 #170 4MX-41 #168 4MX-91 #165 4MX-40 (STD) #162 4MX-90 *(STD) Lean #160 4MX-39 Pilot jet Size Part number (-14948-) Rich #55 4MX-09 #52 4MX-08 #50 4MX-07 *(STD) #48 4MX-06 (STD) Lean[...]

4-4 ENGINE (Except for Canada) EXAMPLES OF CARBURETOR SETTING DEPENDING ON SYMPTOM This shou ld be taken simpl y for an example . It is necessary to set the carburetor while checking the operating conditions of the engine. Symptom Setting Checking At full throttle Hard breathing Shearing noise Whitish spark plug ↓ Lean mixture Increase main jet c[...]

4-5 CHASSIS CHASSIS SELECTION OF THE SECONDARY REDUCTION RATIO (SPROCKET) <Requirement for selection of sec- ondary gear reduction ra tio> • It is generally said that the second- ary gear ratio should be reduced for a longer straight portion of a speed course and should be in creased for a course with many corners. Actual - ly, however, as [...]

4-6 CHASSIS A. Air spring characteristics in relation to oil l evel change B. Load C. Stroke 1. Max. oil level 2. Standard oil level 3. Min. oil level ADJUSTING THE SPRING PRELOAD The spring preload is adjusted by in- stalling the adjustment washer "1 " be- tween the fork spring "2" and damper rod "3". Do not install t[...]

4-7 CHASSIS CHOOSING SET LENGTH 1. Place a stand or block u nder the engine to put the rear wheel above the floor, and measure the length "a" between the rear wheel axle center and the re ar fender holding bolt. 2. Remove the stand or bl ock from the engine and w ith a rider astrid e the seat, measure the sunken length "b" betwe[...]

4-8 CHASSIS SUSPENSION SETTING (FRONT FORK) • If any of the following symptoms is experienced with the standard position as the base, make resetting by reference to the adjustment procedure gi ven in the same chart. • Before any change, set t he rear shock absorber sunken length to the standard figure 90–100 mm (3.5–3.9 in). Symptom Section[...]

4-9 CHASSIS SUSPENSION SETTING (REAR SHOCK ABSORBER) • If any of the following symptoms is experienced with the standard position as the base, make resetting by reference to the adjustment procedure gi ven in the same chart. • Adjust the rebound damping in 2-click increments or decrem ents. • Adjust the low compression damping in 1-click incr[...]

5-1 RADIATOR ENGINE This section is intended for those who have basi c knowled ge and skill concerning th e servicing of Yamaha motorcycles (e.g., Yamaha dealers, se rvice engineers, etc.) T hose who have little knowled ge and skill concernin g servicing are request- ed not to undertake inspection , adjustment, disassembly, or reassembly only by re[...]

5-2 RADIATOR 6 Radia tor hose 4 1 7 Pipe 2/O-ring 1/1 8 Catch tank hose 1 9 Left r adiator 1 10 Radiator hose 1 1 11 Pipe 1 /O-ring 1/1 12 Ca tch tank breather hose 1 13 Ca tch tank 1 Order Part name Q'ty Remarks[...]

5-3 RADIATOR HANDLING NOTE Do not remove the radiator cap when the engine and ra diator are hot. Scaldi ng hot fluid and ste am may be blown out under pressure, which could ca use serious in jury. When the engin e has cooled, open the radiator cap by th e following procedure: Place a thick rag, like a towel, over the radiator cap, sl owly rotate th[...]

5-4 CARBURETOR CARBURETOR REMOVING THE CARBURETOR Order Part name Q'ty Remarks Seat and fuel ta nk Refer to "REMOVING THE SEAT, FUEL TANK AND SIDE COVERS" section in the CHAPTER 3. Rear shock absorber Refer to "REAR SHOCK ABSORBER" sec- tion in the CHAPTER 6. 1C l a m p 2 2 Throttle position sensor lead coupler 1 3 Throttle[...]

5-5 CARBURETOR 13 Bracket (cyli nder head breather pipe) 1 14 Ca rburetor joint 1 Order Part name Q'ty Remarks[...]

5-6 CARBURETOR DISASSEMBLING THE CARBURETOR Order Part name Q'ty Remarks 1 Carburetor breather hose 4 2 Valve lever housing cover 1 3 Screw (throttle shaft) 1 4 Throttle valve 1 5 Need le holder 1 6 Jet needle 1 7 Accelerator pump cover 1 8S p r i n g 1 9 Diaphragm (accelerator pump) 1 10 Air cut valve cover 1 11 Spring (air cut valve) 1 12 Di[...]

5-7 CARBURETOR 19 Main jet 1 20 Ne edle jet 1 21 Spacer 1 22 Pil ot jet 1 23 Starter j et 1 24 Push rod 1 Pull the push rod. 25 Throttl e shaft assembly 1 26 Push rod link lever assembly 1 27 Pil ot air jet 1 28 Co ld starter plunger 1 Order Part name Q'ty Remarks[...]

5-8 CARBURETOR HANDLING NOTE Do not loosen th e screw (throttle position sensor) "1" except when changing the th rottle position sen- sor due to failur e because it will cause a drop in engine pe rfor- mance. REMOVING THE PILOT SCREW (For EUROPE) 1. Remove: • Pilot screw "1" To optimize th e fuel flow at a small throttle openi[...]

5-9 CARBURETOR e. If both are fine, adjust the float height by bending th e float tab "b" on the float. f. Recheck the float height. CHECKING THE FLOAT 1. Inspect: • Float "1" Damage → Replace. CHECKING THE STARTER PLUNGER 1. Inspect: • Cold starter plunger "1" • Hot starter plunger "2" Wear/damage ?[...]

5-10 CARBURETOR • Apply the fluoro chemical grease on the bearings. • Fit the projection "a" on the throttle shaft assembly into the slot "b" in the throttle posit ion sensor. • Make sure the stopper "c" of the spring fits into the recess in the car- buretor . • Turn the throttle shaft assembl y left while hold[...]

5-11 CARBURETOR 16. Install: • Jet needle "1" •C o l l a r " 2 " • Spring "3" • Needle holder "4 " • Throttle valve plate "5" To throttle valve "6 ". 17. Install: • Throttle valve assembly "1" • Screw (throt tle shaft) "2" Install the valve lever rollers &[...]

5-12 CARBURETOR 5. Install: • Throttle cable (pull) "1" • Throttle cable (return) "2" 6. Adjust: • Throttl e grip free play Refer to "ADJUSTING THE THROTTLE CABLE FREE PLAY" section in the CHAPTER 3. 7. Install: • Throttle cable cover "1" • Bolt (thr ottle cable cover) "2" 8. Install: • [...]

5-13 AIR INDICTOIN SYSTEM AIR INDICTOIN SYSTEM REMOVING THE AIR INDUCTION SYSTEM Order Part name Q'ty Remarks 1 Bracket 1 2 Air cut-off valve assembly 1 3 Air induction hose (ai r cut-off valve - front of cyl- inder head) 1 4 Air induction pipe 1 5 Gasket 1 6 Air induction hose (air cut-off valve - rear of cylin- der head) 1 7 Air induction ho[...]

5-14 AIR INDICTOIN SYSTEM CHECKING THE AIR INDUCTION SYSTEM 1. Inspect: • Air induction hose Crack/damage → Replace. • Air induction pipe Crack/damage → Replace. 2. Check: • Operation of air cut valve Pass air through the pipe and check the air cut valve for opera- tion. Does not meet the followi ng con- dition → Replace the air cut val[...]

5-15 CAMSHAFTS CAMSHAFTS REMOVING THE CYLINDER HEAD COVER Order Part name Q'ty Remarks Seat and fuel ta nk Refer to "REMOVING THE SEAT, FUEL TANK AND SIDE COVERS" section in the CHAPTER 3. Air cut-off valve assembly Refer to "AIR INDUCTION SYSTEM" section. Engine upper bracket (right) Refer to "ENGINE REMOVAL" se [...]

5-16 CAMSHAFTS REMOVING THE CAMSHAFTS Order Part name Q'ty Remarks 1 Timing mark accessing screw 1 Refer to removal section. 2 Crankshaft end accessing screw 1 Refer to removal section. 3 Timing chain tensioner cap bolt 1 Refer to removal section. 4 Timing chain tensioner 1 Refer to removal section. 5 Gasket 1 Refer to removal section. 6 Bolt [...]

5-17 CAMSHAFTS REMOVING THE CAMSHAFT 1. Remove: • Timing mark accessing screw "1" • Crankshaft end accessing screw "2" 2. Align: • T.D.C. mark With align mark. Checking steps: a. Turn the crankshaft counterclock- wise with a wren ch. b. Align the T.D.C. mark "a" on the rotor with the align mark "b" on t[...]

5-18 CAMSHAFTS 3. Measure: • Runout (camshaft) Out of specification → Replace. 4. Measure: • Camshaft-to-cap clearance Out of specification → Measure camshaft outside diamete r. Measurement steps: a. Install the camshaft onto the cylin- der head. b. Position a strip of Pl astigauge ® "1" onto the camshaft. c. Insta ll the clip, d[...]

5-19 CAMSHAFTS INSTALLING THE CAMSHAFT 1. Install: • Exhaust camshaft "1" • Intake camshaft "2" Installation steps: a. Turn the crankshaft counterclock- wise with a wren ch. • Apply the molybdenum disul fide oil on the camshafts. • Apply the engine oil on the deco m- pression system. b. Align the T.D.C. mark "a"[...]

5-20 CYLINDER HEAD CYLINDER HEAD REMOVING THE CYLINDER HEAD Tighten the cylinder head bolts to 30 Nm (3.0 m•kg, 22 ft•lb ) in the proper ti ghtening sequenc e, remove and retighten the cylinder head bolts to 20 Nm (2.0 m•kg , 14 ft•lb) in the prop er tightening sequ ence, and then tighten th e cylinder head bolts further to reach the specif[...]

5-21 CYLINDER HEAD CHECKING THE CYLINDER HEAD 1. Eliminate: • Carbon deposits (from the com- bustion chambers) Use a rounded scraper. Do not use a sharp instrument to avoid damaging or scratching: • Spark plug threads • Valve seats 2. Inspect: • Cylinder head Scratches/damage → Replace. 3. Measure: • Cylinder head warpage Out of specifi[...]

5-22 CYLINDER HEAD 3. Install: • Bolt (cylinder head) "1" Bolt (cylinder head): 10 Nm (1.0 m•kg, 7.2 ft•lb)[...]

5-23 VALVES AND VALVE SPRINGS VALVES AND VALVE SPRINGS REMOVING THE VALVES AND VALVE SPRINGS Order Part name Q'ty Remarks Cylinder head Refer to "CYLINDER HEAD" section. 1 Valve lifter 5 Refer to removal sectio n. 2 Adjusting pad 5 Refer to removal section. 3 Valve cotter 10 Refer to removal section. 4 Valve spring retainer 5 5 Valve[...]

5-24 VALVES AND VALVE SPRINGS REMOVING THE VALVE LIFTER AND VALVE COTTER 1. Remove: • Valve lifter "1" • Pad "2" Identify each lifter "1" and pad "2" po- sition very carefully so that they can be reinstalled in their original pla ce. 2. Check: • Valve sealing Leakage at the valve seat → In- spect the [...]

5-25 VALVES AND VALVE SPRINGS 3. Inspect: • Valve face Pitting/wear → Grind the face. • Valve stem end Mushroom shape or diameter larger than the body o f the stem → Replace. 4. Measure: • Margin thickness "a" Out of specification → Replace. 5. Measure: • Runout (valve stem) Out of specification → Replace. • When install[...]

5-26 VALVES AND VALVE SPRINGS CHECKING THE VALVE SPRINGS 1. Measure: • Valve spring free length "a" Out of specification → Replace. 2. Measure: • Compressed spring force "a" Out of specification → Replace. b. Installed length 3. Measure: • Spring tilt "a" Out of specification → Replace. CHECKING THE VALVE L[...]

5-27 CYLINDER AND PISTON CYLINDER AND PISTON REMOVING THE CYLINDER AND PISTON Order Part name Q'ty Remarks Cylinder head Refer to "CYLINDER HEAD" section. 1 Bolt (cylinder) 1 2 Cylinder 1 3 Gasket 1 4 Dowel pin 2 5 Piston pin clip 2 Refer to removal section. 6 Piston pin 1 Refer to removal section. 7 Piston 1 Refer to removal section[...]

5-28 CYLINDER AND PISTON REMOVING THE PISTON AND PISTON RING 1. Remove: • Piston pin clip "1" • Piston pin "2" • Piston "3" • Put identification marks on each piston head for reference during re- installation. • Before removing each piston pin, deburr the clip groove and pin hole area. If the piston pin groov[...]

5-29 CYLINDER AND PISTON You cannot measure the end gap on the expander spacer of the oil control ring. If the oil control ring rails show excessive gap, replace all three rings. CHECKING THE PISTON PIN 1. Inspect: • Piston pin Blue discoloration/gro oves → Re- place, then inspect the lubrication system. 2. Measure: • Piston pin-to-pisto n cl[...]

5-30 CLUTCH CLUTCH REMOVING THE CLUTCH Order Part name Q'ty Remarks Drain the engine oil . Refer to "CHANGING THE ENGINE OIL" section in the CHAPTER 3. Brake pedal Refer to "ENGINE REMOVAL" section. Clutch cable Disconnect at engine side. 1 Clutch cover 1 2 Gasket 1 3 Dowel pin 2 4 Clutch spring 6 5 Pressure plate 1 6 Push [...]

5-31 CLUTCH 14 Nut (clutch boss) 1 Refer to removal section. 15 Lo ck washer 1 Refer to removal sectio n. 16 Cl utch boss 1 Refer to removal section. 17 Thrust wa sher 1 18 Primary driven gear 1 19 Push lever shaft 1 Order Part name Q'ty Remarks[...]

5-32 CLUTCH REMOVING THE CLUTCH BOSS 1. Remove: •N u t " 1 " • Lock washer "2" • Clutch boss "3" Straighten the lock washer tab and use the clutch holding tool "4" to hold the clutch boss. A. For USA and CDN B. Except for USA and CDN CHECKING THE CLUTCH HOUSING AND BOSS 1. Inspect: • Clutch housing &q[...]

5-33 CLUTCH 2. Install: • Lock washer "1" • Nut (clutch boss) "2" Make sure to tighten to specifica- tion; otherw ise, it may damage the other part that is fastened togeth- er. • Install the lock washer with its con- caves fitted over the convexes of the clutch boss. • Use the clutch holding tool "3" to hold th[...]

5-34 OIL FILTER ELEMENT AND WATER PUMP OIL FILTER ELEMENT AND WATER PUMP REMOVING THE OIL FILTER ELEMENT AND WATER PUMP Order Part name Q'ty Remarks Right engine guard Refer to "ENGINE REMOVAL" section. Drain the engine oil . Refer to "CHANGING THE ENGINE OIL" section in the CHAPTER 3. Drain the coolant. Refer to "CHAN[...]

5-35 OIL FILTER ELEMENT AND WATER PUMP 9 Gasket 1 10 Do wel pin/O-ring 3/1 11 Impell er 1 Refer to removal section. 12 Washer 1 Refer to removal section. 13 Impell er shaft 1 Refer to removal section. 14 Oil seal 1 1 Refer to removal sectio n. 15 Oil seal 2 1 Refer to removal sectio n. 16 Bearing 1 Refer to removal section. Order Part name Q't[...]

5-36 OIL FILTER ELEMENT AND WATER PUMP REMOVING THE IMPELLER SHAFT 1. Remove: • Impeller "1" • Washer "2" • Impeller shaft "3" Hold the impeller shaft on its width across the flats "a" with spanners, etc. and remove the impeller. REMOVING THE OIL SEAL It is not necessary to disassemble the water pump, u[...]

5-37 OIL FILTER ELEMENT AND WATER PUMP 2. Install: • Right crankcase cover "1" •B o l t " 2 " •B o l t • Apply the engine oil on the impeller shaft end. • When installing the crankcase cov- er onto the crankca se, be sure that the impeller shaft end "2" aligns with the balancer end slot "3". • Tig[...]

5-38 BALANCER BALANCER REMOVING THE BALANCER Order Part name Q'ty Remarks Primary driven gear Refer to "CLUTCH" secti on. Right crankcase cover Refer to "OIL FILTER ELEMENT AND WA- TER PUMP" section. Stator Refer to "CDI MAGNETO" section. 1 Nut (balancer) 1 Refer to removal section. 2 Nut (primary drive gear) 1 R [...]

5-39 BALANCER REMOVING THE BALANCER 1. Straighten the lock wa sher tab. 2. Loosen: • Nut (balancer) "1" • Nut (primary drive gear) "2" • Nut (balancer shaft driven gear) "3" Place an aluminum plate "a" b etween the teeth of the balancer shaft drive gear "4" and driven gear "5". CHECK[...]

5-40 OIL PUMP OIL PUMP REMOVING THE OIL PUMP Order Part name Q'ty Remarks Primary driven gear Refer to "CLUTCH" section. Right crankcase cover Refer to "OIL FILTER ELEMENT AND WA- TER PUMP" section. 1 Circlip 1 2 Washer 1 3 Oil pump drive gear 1 4 Oil pump assembly 1 5 Dowel pin 2 6 Outer rotor 2 1 7 Circlip 1 8 Inner rotor[...]

5-41 OIL PUMP 15 Oil pump drive shaft 1 16 Ro tor housing 1 Order Part name Q'ty Remarks[...]

5-42 OIL PUMP CHECKING THE OIL PUMP 1. Inspect: • Oil pump drive gear • Oil pump drive shaft • Rotor housing • Oil pump cover Cracks/wear/damage → Replace. 2. Measure: • Tip clearance "a" (between the inner rotor "1" and outer rotor "2") • Side clea rance "b" (between the outer rotor "2&quo[...]

5-43 KICK SHAFT AND SHIFT SHAFT KICK SHAFT AND SHIFT SHAFT REMOVING THE KICK SHAFT AND SHIFT SHAFT Order Part name Q'ty Remarks Oil pump Refer to "OIL PUMP" section. 1 Kick idle gear 1 2 Kick shaft assembly 1 Ref er to removal section. 3 Spring guide 1 4 Torsion spring 1 5 Ratch et wheel 1 6 Kick gear 1 7 Kick shaft 1 8 Washer 1 9 Sh[...]

5-44 KICK SHAFT AND SHIFT SHAFT 17 Pawl 2 18 Pawl pin 2 19 Sprin g 2 20 Bol t (stopper lever) 1 21 Stopp er lever 1 22 Torsion spring 1 23 Segment 1 Refer to removal section. Order Part name Q'ty Remarks[...]

5-45 KICK SHAFT AND SHIFT SHAFT REMOVING THE KICK SHAFT ASSEMBLY 1. Remove: • Kick shaft assembly "1" Unhook the torsion spring "2" from the hole "a" in the crankcase. REMOVING THE SHIFT GUIDE AND SHIFT LEVER ASSEMBLY 1. Remove: • Bolt (shift guide) • Shift gui de "1" • Shift lever assembly "2&qu[...]

5-46 KICK SHAFT AND SHIFT SHAFT INSTALLING THE SHIFT GUIDE AND SHIFT LEVER ASSEMBLY 1. Install: • Spring "1" • Pawl pin "2" •P a w l " 3 " To shift lever "4". Apply the engine oil on the spring, pawl pin and p awl. 2. Install: • Shift lever assembly "1" To shift guide "2". 3. Insta[...]

5-47 KICK SHAFT AND SHIFT SHAFT • Kick idle gear "1" • Washer "2" • Circlip "3" • Apply the e ngine oil on the kick idle gear inner circumference. • Install the kick idle gear with its de- pressed side "a " toward you.[...]

5-48 AC MAGNETO AND STARTER CLUTCH AC MAGNETO AND STARTER CLUTCH REMOVING THE AC MAGNETO AND STARTER CLUTCH Order Part name Q'ty Remarks Drain the engine oil . Refer to "CHANGING THE ENGINE OIL" section in the CHAPTER 3. Seat and fuel ta nk Refer to "REMOVING THE SEAT, FUEL TANK AND SIDE COVERS" section in the CHAPTER 3. Di[...]

5-49 AC MAGNETO AND STARTER CLUTCH Tighten the rotor nut to 65 Nm (6.5 m•kg, 47 ft•lb), loosen and retighten th e rotor nut to 65 Nm (6.5 m•kg, 47 ft•lb). 12 Woodru ff key 1 13 Starter clutch assembly co ver 1 Refer to removal section. 14 Starter clu tch 1 Refer to removal section. 15 Starte r clutch drive gear 1 16 Ho lder 1 17 Pickup coil[...]

5-50 AC MAGNETO AND STARTER CLUTCH REMOVING THE ROTOR 1. Remove: • Nut (rotor) "1" • Washer Use the sheave holder "2". 2. Remove: • Rotor "1" Use the rotor puller "2". REMOVING THE STARTER CLUTCH 1. Remove: • Starter clut ch a ssembly cover "1" Insert a thin screwdriver or the like under the[...]

5-51 AC MAGNETO AND STARTER CLUTCH • Pass the AC magneto lead "5" un- der the pickup coil. • Pass the AC magneto lead "4" un- der the holder as shown. • Take care not to catch the AC mag- neto lead between crankcase cover ribs. • Tighten the bolt (stator) usi ng the T25 bit. • Apply the sealant to the grommet of the AC[...]

5-52 AC MAGNETO AND STARTER CLUTCH 10. Install: • Cover (idle gear 1) "1" •B o l t " 2 " Install the co ver (idle gear 1) wi th its mark "a" facing upw ard. 11. Connect: • AC magneto lead Refer to "CABLE R OUTING DIA- GRAM" section in the CHAPTER 2. 12. Install: • Shift pedal "1" • Bolt (s[...]

5-53 ENGINE REMOVAL ENGINE REMOVAL REMOVING THE ENGINE Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the frame. Refer to "HANDLING NOTE". Drain the engine oil . Refer to "CHANGING THE ENGINE OIL" section in the CHAPTER 3. Seat and fuel ta nk Refer to "REMOVING THE SEAT, FUEL TANK AND[...]

5-54 ENGINE REMOVAL Ignition coil Disconnect the AC magneto lead. Disconnect the starter motor lead. Refer to "ELECTRIC STARTING SYSTEM" section in the CHAPTER 7. Negative battery lead Disconnect at the engine side. 1 Engine guard 1 2 Neutr al switch 1 3 Drive chain sprocket cover 1 4 Nut (drive sprocket) 1 Ref er to removal section. 5 Lo[...]

5-55 ENGINE REMOVAL HANDLING NOTE Support the machine securely so there is no dange r of it falling over. REMOVING THE DRIVE SPROCKET 1. Remove: • Nut (drive sprocket) "1" • Lock washer "2" • Straighten the lock washer tab . • Loosen the nut while appl ying the rear brake. 2. Remove: • Drive sprocket "1" • [...]

5-56 ENGINE REMOVAL 2. Install: • Lock washer "1" • Nut (drive sprocket) "2" Tighten the nut while applying the rear brake. Make sure to tighten to specifica- tion; otherw ise, it may damage the other part that is fastened togeth- er. 3. Bend the lock washer tab to lock the nut. 4. Install: • Drive chain sprocket guide •[...]

5-57 CRANKCASE AND CRANKSHAFT CRANKCASE AND CRANKSHAFT REMOVING THE CRANKSHAFT Order Part name Q'ty Remarks Engine Refer to "ENGINE REMOVAL" section. Piston Refer to "CYLINDE R AND PISTON" section. Balancer Refer to "BALANCER" section. Kick shaft assembly Refer to "KICK SHAFT AND SHIFT SHAFT" section. Se[...]

5-58 CRANKCASE AND CRANKSHAFT 9 Left crankcase 1 Refer to removal section. 10 Oil strai ner 1 11 Bal ancer shaft 1 Refer to removal section. 12 Cranksh aft 1 Refer to removal section. Order Part name Q'ty Remarks[...]

5-59 CRANKCASE AND CRANKSHAFT REMOVING THE CRANKCASE BEARING Order Part name Q'ty Remarks Transmission Refer to "TRANSMISSION, SHIFT CAM AND SHIFT FORK" section. Shift cam and shift fork Refer to "TRANSMISSION, SHIFT CAM AND SHIFT FORK" section. 1 Oil seal 3 2 Bearing 10 Refer to removal section.[...]

5-60 CRANKCASE AND CRANKSHAFT DISASSEMBLING THE CRANKCASE 1. Separate: • Right crankcase • Left crankcase Separation steps: a. Remove the crankcase bolts, hose guide an d clutch cable hold - er. Loosen each bolt 1/4 of a turn at a time and after all the bolts are loos- ened, remove them. b. Remove the right crankcase. • Place the crankcase wi[...]

5-61 CRANKCASE AND CRANKSHAFT CHECKING THE CRANKSHAFT 1. Measure: • Runout limit "a" • Small end free play limit "b" • Connecting rod big end side clearance "c" • Crank w idth "d" Out of specification → Replace. Use the dial gauge and a thick- ness gauge. CHECKING THE OIL STRAINER 1. Inspect: • Oi[...]

5-62 CRANKCASE AND CRANKSHAFT 4. Apply: • Sealant On the right crankc ase. Clean the contacting surface of left and right crankcase before applying the sealant. 5. Install: • Dowel pin "1" • O-ring "2" • Right crankcase To left crankcase. • Apply the lithium soap ba se grease on the O-ring. • Fit the right crankca se[...]

5-63 TRANSMISSION, SHIFT CAM AND SHIFT FORK TRANSMISSION, SHIFT CAM AND SHIFT FORK REMOVING THE TRANSMISSION, SHIFT CAM AND SHIFT FORK Order Part name Q'ty Remarks Engine Refer to "ENGINE REMOVAL" section. Separate the crankcase. Refer to "CRANKCASE AND CRANK- SHAFT" section. 1 Main axle 1 Refer to remova l section. 2 Drive[...]

5-64 TRANSMISSION, SHIFT CAM AND SHIFT FORK REMOVING THE TRANSMISSION 1. Remove: • Main axle "1" • Drive axle "2" • Shift cam • Shift fork 3 • Shift fork 2 • Shift fork 1 • Remove assembly with the collar "3" installed to the crankcase. • Remove assembly carefully. Note the position of each part. Pay pa[...]

5-65 TRANSMISSION, SHIFT CAM AND SHIFT FORK 3. Install: • Washer "1" • Circlip "2" • Be sure the circlip sharp-edged cor- ner "a" is po sitioned oppo site side to the washer and gear "b". • Install the circlip with its ends "c" settled evenly on the spline crests. 4. Install: •C o l l a r [...]

6-1 FRONT WHEEL AND REAR WHEEL CHASSIS This section is intended for those who have basi c knowled ge and skill concerning th e servicing of Yamaha motorcycles (e.g., Yamaha dealers, se rvice engineers, etc.) T hose who have little knowled ge and skill concernin g servicing are request- ed not to undertake inspection , adjustment, disassembly, or re[...]

6-2 FRONT WHEEL AND REAR WHEEL REMOVING THE REAR WHEEL Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". 1 Nut (rear wheel axle) 1 2 Rear whe el axle 1 3 Drive chain puller 2 4 Rear wheel 1 Refer to removal section. 5 Collar 2 6 Rear wheel sprocket 1 7 Oil seal 2 8[...]

6-3 FRONT WHEEL AND REAR WHEEL HANDLING NOTE Support the machine securely so there is no dange r of it falling over. REMOVING THE REAR WHEEL 1. Remove: • Wheel "1" Push the wheel forward and remove the drive chain "2". REMOVING THE WHEEL BEARING 1. Remove: • Bearing "1" Remove the bearing using a general bearing pu[...]

6-4 FRONT WHEEL AND REAR WHEEL 2. Install: • Brake disc "1" • Bolt (brake disc) "2" Tighten the bolts in stage, using a crisscross pattern. 3. Install: •C o l l a r " 1 " Apply the lithium soap base grease on the oil seal lip. 4. Install: • Speed sensor "1" • Apply the lithium soap ba se grease on t[...]

6-5 FRONT WHEEL AND REAR WHEEL 2. Install: • Brake disc "1" • Bolt (brake disc) "2" Tighten the bolts in stage, using a crisscross pattern. 3. Install: • Rear wheel sprocket "1" • Bolt (rear wheel sprocket) "2" • Washer (rear wheel sprocket) "3" • Nut (rear wheel sprocket) "4" [...]

6-6 FRONT BRAKE AND REAR BRAKE FRONT BRAKE AND REAR BRAKE REMOVING THE FRONT BRAKE Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Drain the brake fluid. Refer to removal section. 1 Brake hose hold er (protector) 2 2 Brake hose hold er (brake calipe r) 1 3 Union [...]

6-7 FRONT BRAKE AND REAR BRAKE REMOVING THE REAR BRAKE Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Rear wheel Refer to "FRONT WHEEL AND REAR WHEEL" section. Drain the brake fluid. Refer to removal section. 1 Brake pedal 1 2 Brake master cylinder 1 3[...]

6-8 FRONT BRAKE AND REAR BRAKE DISASSEMBLING THE BRAKE CALIPER Order Part name Q'ty Remarks A. Front B. Rear AB 1P a d p i n 1 1 2 Brake pad 2 2 3 Pad support 1 1 4 Brake caliper piston 2 1 Re fer to removal section. 5 Brake caliper piston dust s eal 2 1 Refer to removal section. 6 Brake caliper piston seal 2 1 Refer to removal section.[...]

6-9 FRONT BRAKE AND REAR BRAKE DISASSEMBLING THE BRAKE MASTER CYLINDER Order Part name Q'ty Remarks A. Front B. Rear 1 Brake master cylinder cap 1 2 Diaphragm 1 3 Reserv oir float 1 4 Brake master cylinder boot 1 5 Circlip 1 Use a long nose circlip pliers. 6 Washer 1 7 Push rod 1 8 Brake master cylinder kit 1[...]

6-10 FRONT BRAKE AND REAR BRAKE HANDLING NOTE Support the machine securely so there is no dange r of it falling over. DRAINING THE BRAKE FLUID 1. Remove: • Brake master cylinder cap "1" • Protector (rear brake) Do not remove the diaphragm. A. Front B. Rear 2. Connect the transparent hose " 2" to the bleed screw "1"[...]

6-11 FRONT BRAKE AND REAR BRAKE 3. Inspect: (front brake only) • Reservoi r float "1" Damage → Replace. 4. Inspect: • Brake master cylinder piston "1" • Brake master cylinder cup "2" Wear/damage/score marks → Re- place brake master cylinder kit. A. Front B. Rear CHECKING THE BRAKE CALIPER 1. Inspect: • Brak[...]

6-12 FRONT BRAKE AND REAR BRAKE 2. Install: • Brake caliper "1" • Bolt (brake caliper) "2" 3. Tighten: • Pad pin "3" 4. Install: • Pad pin plug "4" INSTALLING THE REAR BRAKE CALIPER 1. Install: • Pad support "1" • Brake pad "2" • Pad pin "3" • Install the brake pa[...]

6-13 FRONT BRAKE AND REAR BRAKE INSTALLING THE FRONT BRAKE MASTER CYLINDER 1. Install: • Brake master cylinder "1" • Brake master cylinder bracket "2" • Bolt (brake master cylinder brack- et) "3" • Install the bracket so that the arrow mark "a" face upward. • First tighten the bolts on the upper sid[...]

6-14 FRONT BRAKE AND REAR BRAKE 2. Install: • Brake hose hol der "1" • Bolt (brake h ose holder) "2" 3. Install: • Brake hose hol der "1" • Nut (brake h ose holder) "2" Align the top "a" of the brake hose holder with the paint "b" of the brake hose. 4. Pass the brake hose through t[...]

6-15 FRONT BRAKE AND REAR BRAKE A. Front B. Rear 2. Air bleed: • Brake system Refer to "BLEEDING THE HY- DRAULIC BRAKE SYSTEM" sec- tion in the CHAPTER 3. 3. Inspect: • Brake fluid level Fluid at lower l evel → Fill up. Refer to "CHECKING THE BRAKE FLUID LEVEL" section in the CHAPTER 3. 4. Install: • Reservoir float (fro[...]

6-16 FRONT FORK FRONT FORK REMOVING THE FRONT FORK Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Front wheel Refer to "FRONT WHEEL AND REAR WHEEL" section. Front brake caliper Refer to "FRONT BRAKE AND REAR BRAKE" section. Headlight Handleba[...]

6-17 FRONT FORK DISASSEMBLING THE F RONT FORK Order Part name Q'ty Remarks 1 Front fork cap bolt 1 Refer to removal section. 2 Fork spring 1 Drain the fork oil. 3 Dust seal 1 Refer to removal sectio n. 4 Stopper ring 1 Refer to removal section. 5 Inner tube 1 Refer to removal section. 6 Outer tube 1 7 Piston metal 1 8 Slide metal 1 9 Oil seal [...]

6-18 FRONT FORK HANDLING NOTE Support the machine securely so there is no dange r of it falling over. The front fork requires careful atten- tion. So it is recommended that the front fork be maintained at the deal- ers. To prevent an ac cidental explosion of air, the following instructions should be observed: • The front fork with a built- in pis[...]

6-19 FRONT FORK The bending value is shown by one half of the dial gauge reading. Do not attempt to straighten a bent inner tube as this may dangerous- ly weaken the tube . CHECKING THE OUTER TUBE 1. Inspect: • Outer tub e "1" Score marks/we ar/damage → Re- place. CHECKING THE FRONT FORK CAP BOLT 1. Inspect: • Front fork cap bolt &q[...]

6-20 FRONT FORK 8. Install: • Outer tub e "1" To inner tube "2". 9. Install: • Slide meta l "1" • Oil seal washer "2" To outer tube slot. Press the slide metal into the outer tube with fork seal driver "3". 10. Install: • Oil seal "1" Press the oil seal into the outer tube with for[...]

6-21 FRONT FORK 20. Measure: • Oil level (left and right) "a" Out of specification → Adjust. Be sure to install the spring guide "2" when checking the oil level. Never fail to make the oil level ad- justment between the maximum and minimum level and always ad - just each front fork to the same setting. Uneven adjustmen t can[...]

6-22 FRONT FORK INSTALLING T HE FRONT FORK 1. Install: • Front fork "1" • Temporarily tighten the pinch bolts (lower brack et). • Do not tighten the pinch bolts (up- per bracket) yet. 2. Tighten: • Front fork cap bolt 3. Adjust: • Front fork top end "a" 4. Tighten: • Pinch bolt (upper bracket) "1" • Pinch[...]

6-23 HANDLEBAR HANDLEBAR REMOVING THE HANDLEBAR Order Part name Q'ty Remarks Headlight 1 Hot starter cable 1 Disconnect at the lever side. 2 Hot start er lever holder 1 3 Clutch cable 1 Disconnect at the lever side. 4 Clutch lever holder 1 Disconnect the clutch switch lead. 5 Engine stop switch 1 Disconnect the engine stop switch lead. 6 Brake[...]

6-24 HANDLEBAR REMOVING THE BRAKE MASTER CYLINDER 1. Remove: • Brake master cylinder bracket "1" • Brake master cylinder "2" • Do not let the brake master cylin- der hang on th e brake hose. • Keep the brake master cylinder cap side horizontal to prevent air from coming in. REMOVING THE GRIP 1. Remove: •G r i p " [...]

[...]

6-26 HANDLEBAR 12. Install: • Clutch cable "1" • Hot starter cable "2" Apply the lithium soap base grease on the clutch cable end and hot start- er cable end. 13. Adjust: • Clutch lever free play Refer to "ADJUSTING THE CLUTCH CABLE FREE PLAY" section in the CHAPTER 3. • Hot starter lever free play Refer to &qu[...]

6-27 STEERING STEERING REMOVING THE STEERING Order Part name Q'ty Remarks TIGHTENING STEPS: • Tighten ring nut. 38 Nm (3.8 m•kg, 27 ft•lb) • Loosen it one turn. • Retighten it. 7 Nm (0.7 m•kg, 5.1 ft• lb) Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Headlight Handlebar Refer[...]

6-28 STEERING 9 Bearing race cover 1 10 Up per bearing 1 11 Lo wer bearing 1 Refer to removal section. 12 Beari ng race 2 Refer to removal sectio n. Order Part name Q'ty Remarks[...]

6-29 STEERING HANDLING NOTE Support the machine securely so there is no dange r of it falling over. REMOVING THE STEERING RING NUT 1. Remove: • Steering ring nut "1" Use the steering nut wrench "2". Support the steering stem so that it may not fall d own. REMOVING THE LOWER BEARING 1. Remove: • Lower bearing "1" Us[...]

6-30 STEERING 6. Install: • Washer "1" 7. Install: • Front fork "1" • Upper bracket "2" • Main switch "3" • Front brake hose guide bracket "4" • Temporarily tighten the pinch bolts (lower brack et). • Do not tighten the pinch bolts (up- per bracket) yet. 8. Install: • Guide (speed se[...]

6-31 SWINGARM SWINGARM REMOVING THE SWINGARM Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Brake hose holder Refer to "FRONT BRAKE AND REAR BRAKE" section. Rear brake caliper Refer to "FRONT BRAKE AND REAR BRAKE" section. Bolt (brake pedal) [...]

6-32 SWINGARM DISASSEMBLING THE SWINGARM Order Part name Q'ty Remarks 1 Cap 2 Refer to removal section. 2 Relay arm 1 3 Connecting rod 1 4 Collar 2 5 Oil seal 2 6 Thrust bearing 2 7 Bushing 2 8 Oil seal 8 9 Bearing 10 Refer to removal section.[...]

6-33 SWINGARM HANDLING NOTE Support the machine securely so there is no dange r of it falling over. REMOVING THE CAP 1. Remove: • Left cap "1" Remove with a slotted-head screw- driver inserted under the mark " a" on the left cap. REMOVING THE BEARING 1. Remove: • Bearing "1" Remove the bearing by pressing its outer[...]

6-34 SWINGARM INSTALLING THE SWINGARM 1. Install: • Bushing "1" • Thrust bearing "2" • Oil seal "3" •C o l l a r " 4 " To swingarm "5" Apply the molybdenum disulfide grease on the bushin gs, thrust bear- ings, oil seal lips and contact surfaces of the collar and thrust b earing. 2. Install: [...]

6-35 SWINGARM 10. Tighten: • Nut (connecting rod) "1" 11. Tighten: • Nut (relay arm) "1" 12. Install: •C a p " 1 " Install the right cap with its mark "a" facing forward. 13. Install: • Bolt (lower chain tensioner) "1" • Washer "2" •C o l l a r " 3 " • Lower chain t[...]

6-36 REAR SHOCK ABSORBER REAR SHOCK ABSORBER REMOVING THE REAR SHOCK ABSORBER Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Seat and side cover Refer to "REMOVING THE SEAT, FUEL TANK AND SIDE COVERS" section in the CHAPTER 3. Silencer Refer to "R[...]

6-37 REAR SHOCK ABSORBER 2 Taillight coupler 1 3 CDI unit coupler 3 4 Plastic band 1 5 Clamp (air filter joint) 1 Only loosening. 6R e a r f r a m e 1 7 Bolt (rear shock absorber-relay arm) 1 Hold the swingarm. 8 Bolt (rear shock absorber-frame) 1 9 Rear shock absorber 1 10 Lo cknut 1 Only loosening. 11 Adj uster 1 Only loosen ing. 12 Lo wer spring[...]

6-38 REAR SHOCK ABSORBER HANDLING NOTE • Support the machin e securely so there is no danger of it falling over. • This rear s hock absorber is pro- vided with a separate type tank filled with high- pressure nitro- gen gas. To pr event the danger of explosion, read and u nder- stand the follow ing information before handli ng the shock ab- sorb[...]

6-39 REAR SHOCK ABSORBER 2. Install: • Stopper ring (upper bearing ) "1" After installing the sto pper ring, push back the bearing until it contacts the stopper ring. 3. Install: • Lower bearing "1" Install the bearing by pressing it on the side having the manufacture' s marks or numbers. INSTALLING THE SPRING (REAR SHO[...]

6-40 REAR SHOCK ABSORBER 7. Tighten: • Screw (air filter joint) "1" 8. Install: • Plastic band • Taillight coupler • Locking tie Screw (air filter joint): 3 Nm (0.3 m•kg, 2.2 ft•lb)[...]

7-1 ELECTRICAL This section is intended for those who have basi c knowled ge and skill concerning th e servicing of Yamaha motorcycles (e.g., Yamaha dealers, se rvice engineers, etc.) T hose who have little knowled ge and skill concernin g servicing are request- ed not to undertake inspection , adjustment, disassembly, or reassembly only by refere [...]

7-2 ELECTRICAL COMPONENTS AND WIRING DIAGRAM ELECTRICAL COMPONENTS AND WIRING DIAGRAM ELECTRICAL COMPONENTS 1. Headlight 2. Multi-function displ ay 3. Engine stop switch 4. Clutch switch 5. Diode 6. Starter relay diode 7. Throttle position sensor 8. Starter relay 9. Fuse 10. Starting circuit cut-off relay 11. CDI unit 12. Taillight 13. Neutral swit[...]

7-3 ELECTRICAL COMPONENTS AND WIRING DIAGRAM WIRING DIAGRAM 1. Headlight 2. Multi-function displ ay 3. Engine stop switch 4. Clutch switch 5. Diode 6. Starter relay diode 7. Throttle position sensor 8. Starter relay 9. Fuse 10. Starting circuit cut-off relay 11. CDI unit 12. Taillight 13. Neutral switch 14. Starter motor 15. AC magneto 16. Re ctifi[...]

7-4 IGNITION SYSTEM IGNITION SYSTEM INSPECTION STEPS Use the following steps for checking the possibility of the malfuncti oning engine being attributable to igni tion system failure and for checking the spa rk plug which will not spark. *1 marked: Refer to "CHECKING TH E FUSE" section in the CHAPTER 3. *2 marked: Refer to "CHECKING [...]

7-5 IGNITION SYSTEM SPARK GAP TEST 1. Disconnect the ignition coil from spark plug. 2. Remove the ignition co il cap. 3. Connect the dynamic spark tester "1" (ignition ch ecker "2") as shown. • Ignition coil "3" • Spark plug "4" A. For USA and CDN B. Except for USA and CDN 4. Kick the kickstarter crank. 5[...]

7-6 ELECTRIC STARTING SYSTEM 3. Inspect: • Secondary coil resistance Out of specification → Replace. 4. Inspect: • Sealed portion of ignition coil "a" • Spark plug terminal pin "b" • Threaded portion o f spark plug "c" Wear → Replace. CHECKING THE AC MAGNETO 1. Inspect: • Pickup coil resistance Out of spe[...]

7-7 ELECTRIC STARTING SYSTEM INSPECTION STEPS If the starter motor will not operate, use the fo llowing inspection steps. *1 marked: Refer to "CHECKING TH E FUSE" section in the CHAPTER 3. *2 marked: Refer to "CHECKING AND CHARGIN G THE BATTERY" section in the CHAPTER 3. *3 marked: Refer to "CHECKING THE MAIN SWITCH" s[...]

7-8 ELECTRIC STARTING SYSTEM CHECKING THE COUPLERS AND LEADS CONNECTION 1. Check: • Couplers and leads con nection Rust/dust/looseness/short-circuit → Repai r or replace. CHECKING THE STARTER MOTOR OPERATION 1. Connect the posi tive battery ter- minal "1" and starter motor lead "2" with a jumper lead " 3". Not oper[...]

7-9 ELECTRIC STARTING SYSTEM CHECKING THE START SWITCH 1. Inspect: • Start switch conduction Not conductive while it is pushed → Replace. Conductive while it is freed → Re- place. Set the tester selection position to " Ω × 1". 2. Inspect: • Rubber part "a" Tears/damage → Replace. Tester (+) lead → Black lead "[...]

7-10 ELECTRIC STARTING SYSTEM REMOVING THE STARTER MOTOR Order Part name Q'ty Remarks Exhaust pipe Refer to "REMOVING THE EXHAUST PIPE AND SILENCER" section in the CHAPTER 3. 1 Starter motor 1[...]

7-11 ELECTRIC STARTING SYSTEM DISASSEMBLING THE STARTER MOTOR Order Part name Q'ty Remarks 1 Starter motor front cover 1 2 Washer (starter motor front cover) 1 3 Washer 1 4 Circlip 1 5O - r i n g 1 6 Starter motor yoke 1 7 Armature assembly 1 8 Starter motor rear cover 1 9 Brush 2 10 Brush sprin g 2[...]

7-12 ELECTRIC STARTING SYSTEM CHECKING AND REPAIRING THE STARTER MOTOR 1. Check: • Commutator Dirt → Cle an with 600 grit sandpa - per. 2. Measure: • Commutator diameter "a" Out of specification → Replace the starter motor. 3. Measure: • Mica undercut "a" Out of specification → Scrape the mica to the prope r measurem[...]

7-13 ELECTRIC STARTING SYSTEM 4. Install: • O-ring "1" • Circlip • Plain washer "2" • Washer (starter motor front cover) "3" • Starter motor front cover "4" • For installation, align the proj ec- tions on the washer with the slots in the front cover. • Align the match mark "a" on the s[...]

7-14 CHARGING SYSTEM CHARGING SYSTEM INSPECTION STEPS If the battery is not charged, use the followin g inspection steps. *1 marked: Refer to "CHECKING TH E FUSE" section in the CHAPTER 3. *2 marked: Refer to "CHECKING AND CHARGIN G THE BATTERY" section in the CHAPTER 3. • Remove the following p arts before i nspection. 1. Sea[...]

7-15 CHARGING SYSTEM CHECKING THE COUPLERS AND LEADS CONNECTION 1. Check: • Couplers and leads con nection Rust/dust/looseness/short-circuit → Repai r or replace. CHECKING THE CHARGING VOLTAGE 1. Start the engine. 2. Inspect: • Charging vo ltage Out of specification → If no failure is found in checking the source coil resistance, replace th[...]

7-16 THROTTLE POSITION SENSOR SYSTEM THROTTLE POSITION SENSOR SYSTEM INSPECTION STEPS If the throttle position senso r will not operate, use the follo wing inspection steps. Use the following special to ols in this inspection. Check entire ignition system for connection. No good → Repai r or replace. OK ↓ Check throttle position sen sor.(Thrott[...]

7-17 THROTTLE POSITION SENSOR SYSTEM HANDLING NOTE Do not loosen th e screw (throttle position sensor) "1" except when changing the th rottle position sen- sor due to failur e because it will cause a drop in engine pe rfor- mance. CHECKING THE COUPLERS AND LEADS CONNECTION 1. Check: • Couplers and leads con nection Rust/dust/looseness/s[...]

7-18 THROTTLE POSITION SENSOR SYSTEM 9. Adjust: • Throttle po sition sensor output voltage Adjustme nt steps: a. Adjust the installa tion angle of the throttle position sensor "1" to ob- tain the specified output voltage. Measure the output voltage accurate- ly with a digital e lectronic voltmeter that gives an easy reading of a small v[...]

7-19 LIGHTING SYSTEM LIGHTING SYSTEM INSPECTION STEPS Refer to th e following flow chart when inspect ing the lighting system for possible problems. • Remove the following p arts before i nspection. 1. Seat 2. Fuel tank 3. Left side cover • Use the following special to ols in this inspection. Check the bulb and bulb socket. No goo d → Replac [...]

7-20 LIGHTING SYSTEM CHECKING THE TAILLIGHT (LEDs) 1. Disconnect the taillight coupler. 2. Connect two jumper leads "1" from the battery terminals to the respective coupler terminal as shown. 3. Check: • LED (for proper operation) Does not light → Replace the tail - light assemb ly. • A wire that is used as a jumper lead must have a[...]

7-21 SIGNALING SYSTEM SIGNALING SYSTEM INSPECTION STEPS If the speedometer will not operate , use the following inspection steps. *1 marked: Refer to "CHECKING AND CHARGIN G THE BATTERY" section in the CHAPTER 3. • Remove the following p arts before i nspection. 1. Headlight • Use the following special to ols in this inspection. *1 Ch[...]

7-22 SIGNALING SYSTEM CHECKING THE COUPLERS AND LEADS CONNECTION 1. Check: • Couplers and leads con nection Rust/dust/looseness/short-circuit → Repai r or replace. CHECKING THE MULTI-FUNCTION DISPLAY INPUT VOLTAGE 1. Disconn ect the multi-function dis- play coupler. 2. Set the main switch to "ON". 3. Measure: • Multi-function displa[...]