Yamaha RST90B manuale d’uso

OWNER’S MANUAL RS90PB RS90PLTB RST90B RST90PGTB 8HV-28199-10 LIT-12628-03-03 ESU10012 Read this manual carefully before operating this vehicle. DIC183[...]

ESU10041 Read this manua l carefully before opera ting this vehicle. Thi s manual shou ld stay with this ve hicle if it is sol d. U8HV10E0.book Page 1 Monday, May 16, 2011 1:15 PM[...]

Introduction ESU10121 Congratulations on your purchase of a Yamaha snowmob ile. This model is the result of Yamaha’s vast experience in the produc- tion of fine s porting and touring snowmobiles. It represents the high degree of craftsmanship and reliability that have made Yamaha a lead- er in these fields. This manual w ill give you an understan[...]

Important manual information ESU10151 Particularly important information is distin - guished in this manual by the following no ta- tions. This is the safety alert symbol. It is used to alert you to potentia l personal inj ury haz- ards. Obey all safety messages that follow this symbol to avoid pos sible injury or death. W ARNING EWS00021 A WARNING[...]

Contents Location of the importa nt labels ..... 1 Safety informa tion . ............. .............. 6 Description ....... ............. ............ ........ 9 Control functions ................ ............ 12 Main swi tch ................. ............ ..... 12 Starter (choke) leve r (RST90) ...... 12 Throttle lev er ............... ...........[...]

Contents Adju sting the engine idling spe ed (RST90) ............. ............. ........... 69 Adjusti ng the throttle lev er free play ....... ............. ................... ..... 69 Checking th e thro ttle over ride system (T.O.R .S.) .......... ........... 72 Checking th e air fil ter .............. ..... 73 Carburetor s (RST90 ) ... .......[...]

Location of the important labels 1 ESU10216 Read and understand a ll of the labels on your ve hicle. They contain important information for safe and proper operati on of your vehicle. Ne ver remove any labels from your vehicle. If a label becomes difficult to read or come s off, a r eplacement label is av ailable from your Yamaha deal- er. 1 3 9 2 [...]

Location of the important labels 2 12 11 10 13 17 17 12 17 15 11 14 10 16 17 11 12 17 14 16 17 15 10 RS90P / RS90PL T RST90PGT RST90 U8HV10E0.book Page 2 Monday, May 16, 2011 1:15 PM[...]

Location of the important labels 3 ATTENTION 8ET-2815K-10 TUNE-UP SPECIFICATI ONS ENGINE 1.SPARK PLUG 2.SPARK PLUG GAP 3.IDLE SPEED SPEC IFICAT IONS D E LA M ISE AU POINT MOTEUR 1.TYPE DE BOUGIE 2.ECARTEMENT DES ÉLECTRODES 3.RÉGIME DE RALENTI CR8E(NGK) 0.7 ~ 0.8 mm (0.028 ~ 0.031 in) 1300 ± 50 r/min CR8E(NGK) 0.7 ~ 0.8 mm 1300 ± 50 r/min 8HF 8H[...]

Location of the important labels 4 DRIVE 1. CHAIN CASE OIL Q ’ TY 2. CHAIN CASE OIL TYPE 3. TRACK TENSION * FOR MORE INFO: SEE SERVICE MANUAL FOR THIS MODEL. * SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE. ENTRA Î NEMENT 1. CAPACIT É D ’ HUILE DU CARTER DE CHA Î NE 2. TYPE D ’ HUILE DU CARTER DE CHA Î NE 3. FL È CHE DE LA CHENILLE * P[...]

Location of the important labels 5 20kg {44lbs} LO AD LIMIT / CHARGE LIMITE 8FM-24897-01 10kg {22lbs} LO AD LIMIT / CHARGE LIMITE 8ET-24897-00 MAX. TO WING FORCE FORCE DE REMORQU AGE MAX. 1176 N (120 kgf), 264 lbf MAX. VERTICAL FORCE FORCE VERTICALE MAX. 147 N (15 kgf), 33 lbf 8GS-2817S-E0 13 RS90PLT 14 RST90 / RST90PGT 15 RST90 / RST90PGT 16 RST90[...]

Safety information 6 ESU10193 As the vehicle ’ s owner, you are responsible for the safe and proper operation of your snowmobile. When you ride yo ur snowmo- bile, you must know and use the foll ow ing for your safety. Severe injury or death m ay result if you ignore any of the following . Before you opera te your snowmobile ● Read the Owner ?[...]

Safety information 7 ● Always ride with other snowmobilers when going on a ride. You m ay need help if you run out of fuel, have an accident, or damage your snowmobile . ● Many surfaces such as ice and hardpacked snow require much longer stopping distanc - es. Be alert, plan ahead and begin deceler- ating early. The best braking method on most [...]

Safety information 8 clothes dryers, and the like. Allow the en- gine to cool off before storing the snowmo- bile in an enclosed spa ce. U8HV10E0.book Page 8 Monday, May 16, 2011 1:15 PM[...]

Description 9 ESU10261 1,2,3 4 5,6,7 8,9 10 11 12 13 1,2,3 RS90P RS90PL T 4 5,6,7 8,9 10 11 12 13 1. Battery 2. Main fuse 3. Air filter 4. Oil fill er cap 5. Fuse box 6. Coolant reservoir 7. Coolant recov er y tank 8. Storage compar tment 9. T ool kit 10. T ail/brak e light 11. Slide rail suspension 12. Drive tr ack 13. V -belt holder U8HV10E0.book[...]

Descripti on 10 1,2,3 4 7 8 9 10,11,12 13 15 16 17 5,6 14 RST90PGT RST90 10,12 1,2,3,4 5,6 20 7 8 9 19 13 14 15 18 16 17 1. Battery 2. Main fuse 3. Air filter 4. Oil fill er cap 5. Fuse box 6. Coolant reservoir 7. P as senger grip warmer switch 8. P as senger grip 9. Backrest 10. Storage compar tment 11. Storage pouch (RST90PGT) 12. T ool kit 13. T[...]

Description 11 TIP ● The snowmob ile you have purchased may differ sligh tly from those shown in the figures of this manual. ● Design and spec ifications are subjected to change without no t ice. 1 23 5 6 47 8 9 10 11 123 1 1 13 8 10 4 7 6 9 12 12 1 RS90P / RS90PL T RST90PGT RST90 23 6 47 5 10 8 9 11 1. Brake le ver 2. P ar king brake le ver 3.[...]

Control functions 12 ESU13740 Main switch The main switch controls the ignition and lighting systems. The various positions are described below. Off The ignition circuit is sw itched off. The key can be removed onl y in this position. On The ignition circuit is sw itched on. Start The starting circuit is switched on. The starter motor cranks the en[...]

Control functions 13 ESU13750 Throttle override system (T.O.R.S.) W ARNING EWS00041 If the T.O.R.S. is activated, make sure that the cause of the malfunction has been cor- rected and that the engine can be oper ated without a problem before restarting the engine. Continuing to oper ate with a mal- function could cause loss of control or damage. If [...]

Control functions 14 RST90 ESU14101 Multi-function meter un it RS90P / RS 90PLT / R ST90PG T The multi-function meter un it is equipped with the following: ● a digital speedometer ● a tachometer ● an odometer ● two tripmeters (which show the di stance traveled since th ey were last set to zero) ● a fuel reserve tripmeter (which shows the [...]

Control functions 15 Odometer and tripmeter mode s Pushing the “ SELECT ” button switches the display between the odometer mode “ ODO ” and the tripmeter m odes “ TRIP A ” a nd “ TRIP B ” in the follow ing order: ODO → TRIP A → TRIP B → ODO If the fuel level warning indicator and warning light come on (see page 19), the odome [...]

Control functions 16 If the engine oil is changed before the oil change tripmeter appears in the display ( i.e., before the periodic oil change interval has been reached), the tripmeter must be rese t af- ter the oil change f or the next periodic oil change to be indicated at the correct tim e. In that case, reset the oil change tripmeter as follow[...]

Control functions 17 ● a digital speedometer ● a tachometer ● an odometer ● a tripmeter (which shows the distance trav- eled since it was la st set to zero) ● warning indicators (which s how engine trouble, coolant tem perature, fuel level, and oil level warnings) ● indicator lights (w hich show hig h beam and low coolant temperature co[...]

Control functions 18 RS90P / RS90PLT / RST90PGT RST90 ESU13761 Low coolant temperature indi- cator light “” The low coolant temperature indicator light comes on when th e coolant temperature is low and informs the rider that the snowmobile should be warmed up. After the engine is started, warm it up until th e indicator light goes off. The snow[...]

Control functions 19 ESU10426 Fuel meter and gri p/thumb warmer level indica tor The fuel meter and grip/thumb warmer level indicator have e ight segments which show the amount of fuel rem aining in the fuel tank, the grip warmer level, o r the thumb warmer level. RS90P / RS90PLT / RST90PGT RST90 Fuel meter The display seg m ents of the fuel m eter[...]

Control functions 20 When the thumb w armer adjusting sw itch is pressed, the thumb warmer in dicator comes on and the display switches to the thumb warmer lev el. See “ Grip /thumb warmer adjusting switch ” on page 24 for detailed informati on. RS90P / RS90PLT / RST90PGT RST90 RS90P / RS90PLT / RST90PGT RST90 TIP ● The grip/thumb warm er lev[...]

Control functions 21 ● The top segment of the grip/thumb warmer level indicator fla shes once when the grip/thumb warmer adjustment reaches the maximum level . The bottom segment of the grip/thumb warmer level indicator flashes once when the grip/thumb warmer adjus t- ment reaches the minimu m level. ● When the engine is started, the grip/thumb[...]

Control functions 22 If the oil level w arning indicator and the w arn- ing light do not go off, check the engine oil lev- el in the oil tank (see page 78 for engine oil level checkin g procedures), and add engine oil if necessary. If the oil level w arning indicator and the w arn- ing light still rem ain on, have a Yamaha deale r check the sn owmo[...]

Control functions 23 ESU10513 Coolant temperature warning indicator “” If the engine overheats, the coolant tempera- ture warning indicator and the warning light come on. When thi s occurs, stop the engine immediately and allow the engine to cool down, and then check the co olant level in the coolant reservoir. (See page 84 for checking procedu[...]

Control functions 24 ate the engine longer than necessary if there is an error code to avoid possible e n- gine damage. [ECS008 20] RS90P / RS90PLT / RST90PGT RST90 ESU10531 Engine stop switch “” The engine s t op switch i s used to st op the en- gine in an emergency. Simply push the stop switch to s top the engine. To start the engine, pull th[...]

Control functions 25 RS90P / RS90PLT / RST90PGT RST90 To raise the temperature To raise the temperature, press the respec- tive switch to “ HI ” . To lower the temperature To lower the temperature, press the respec- tive switch to “ LO ” . See “ Fuel meter and grip/thumb warmer level indicator ” on page 19 for detail ed information. ESU[...]

Control functions 26 3. After using the auxiliary DC jack, be sure to remove the accessory power plug from the jack and to close the auxilia r y DC jack cap. NOT ICE ECS00122 ● To avoid circuit overload and a possible fuse blowing, do not use acce ssories re- quiring more than the maximum rated capacity for the auxiliary DC jack. (See page 109 fo[...]

Control functions 27 TIP When the brake lev er is squeezed, the brake lig ht come s on . NOT ICE ECS00060 Make sure that the brake lever end does not project out over the handlebar end. This will help prevent brake lever damage when the snowmobile is placed on its side for service. ESU10581 Parking brake leve r When parking the snowmobile or starti[...]

Control functions 28 RST90 NOT ICE ECS00072 Do not use the shift lever while the snow- mobile is moving, otherwise the drive train could be damaged. ESU14092 Drive guard W ARNING EWS00402 ● Coming in contact with the rotating V- belt or clutch parts can caus e severe in- jury or death. Never run the engine with the drive guard removed. ● Make s[...]

Control functions 29 The drive guard is designed to protect the V- belt clutch and V-belt in case parts break or come loose. The drive guard is located behind the left side cover (RS90P / RS90PLT / RST90PGT), or under the shroud (RST90). [See p age 63 (RS90P / RS90PLT / RST90PGT) or page 67 (RST90) for information on how to access the drive guard.][...]

Control functions 30 RS90P / RS90PLT / RST90PGT RST90 NOT ICE ECS00180 Make sure that the V-belt is installed se- curely in the holders. ESU13302 Passenger grips (RST90PGT) The passenger grips can be installed in three different positions to suit the pass enger ’ s preference. To change the pa ssenger grip posi- tion 1. Remove the passen ger grip[...]

Control functions 31 RST90 RST90PGT ESU14050 Passenger foot rests (RST90 / RST90PGT) The passenger footrests can be installed in two (RST90) or three (RST90PGT) different positions to suit the passen ger ’ s preference. To change the pos ition of a footrest, remove the screws, place the foo trest in the desired position, and then install and tigh[...]

Control functions 32 RST90 RST90PGT RST90PGT To adj ust the backre st positio n Pull the backrest adjusting lever upward, and then move the bac krest to the desired posi- tion. When riding without a passenger, the back- rest can be mov ed to the forward-mos t posi- tion, and its angle can be adjus ted to suit the operator ’ s preference as sho w [...]

Control functions 33 To clos e th e sto rage compartm ent Fold the storage compartment cover down, and then turn the fastener to the original posi- tion. RST90PGT This snowmobil e is equipped with a storage compartment, which includes a storage pouch. Stora ge compartm ent NOT ICE ECS00900 The bottom of the storage compartment may be hot during or [...]

Control functions 34 NOT ICE ECS00781 Before starting the engine, make sure t hat the tool kit is securely fastened and that the storage pouch zipper is completely closed. ESU10823 Storag e areas (RST9 0) This snowmobil e is equipped with a storage compartment, rear storage area, and rear c ar- rier. Stora ge compartm ent The storage compartm ent i[...]

Control functions 35 3. Remove the pass enger seat lock knob, and then remove the passenger seat. 4. Align the holes in the rear carrier with the bolts on the carrier lock bracket, and then place the rear carrier on the c arrier lock bracket. 5. Slide the rear carrier backward until it stops. 6. Pull the carrier lock lever up to lock the rear carri[...]

Control functions 36 3. Align the holes in the backrest bracket with the bolts on the carrier lock bracke t , and then place the ba ckrest on the carrier lock bracket. 4. Align the holes in the rear carrier with the bolts on the carrier lock bracket, and then place the rear carrier on the c arrier lock bracket. 5. Slide both the ba ckrest and the r[...]

Control functions 37 ESU10605 Fuel W ARNING EWS00071 Gasoline and gasoline vapor s are ex- tremely flammable. To avoid fires and ex- plosions and to reduce the risk of injury when refueling, follow these instructions. Make sure there is suffic ient gasoline in the tank. 1. Before refueling, turn off the engi ne and be sure th at nobody is on the sn[...]

Control functions 38 Your Yamaha engine has been de signed to use regular unleaded gasolin e with a pump octane number [(R+M)/2] of 86 or higher, or a research octane number of 91 or higher. NOT ICE ECS00084 ● Oxygenated fuels (gasohol) containing a maximum 10% of ethanol (E10) can be used, although richer jetting may be re- quired to prevent eng[...]

Control functions 39 1. Loosen the locknut. 2. To increase the s pring preload and th ere- by harden the s uspension, turn the ad - justing nut in direction ( a). To decrease the spring preload and thereby soften the suspension, turn the adjusting nut in di- rec ti on (b ). TIP The spring preload setting is dete rmined by measuring distance A, sh o[...]

Control functions 40 TIP The spring preload setting is dete rmined by measuring distance A, sh ow n in the illustra- tion. The longer distance A is, the higher the spring preload; the shorter distanc e A is, the lower the spring preload. 3. Tighten the lock nut to the specified torque. NOTICE: Always tighten the locknut against the adjusting nut, a[...]

Control functions 41 TIP The spring preload setting is dete rmined by measuring distance A, sh ow n in the illustra- tion. The longer distance A is, the higher the spring preload; the shorter distanc e A is, the lower the spring preload. 3. Tighten the lock nut to the specified torque. NOTICE: Always tighten the locknut against the adjusting nut, a[...]

Control functions 42 2. Pull the lock pin and turn the special tools to change the block posi tion. 3. Release the lock pin. 4. Remove the spec ial tools from the 2-up adjusting block. ESU14310 Adjusting the dampi ng force of the rear sh ock ab sorbe r (RS90P / RS90P LT / RST90PGT ) RST90PGT The compression damping force can be ad- justed by turnin[...]

Control functions 43 ESU11047 Adjusting the control rods The weight transfer c an be adjusted by tur n- ing the adjus ter on the control rod (R S90P / RS90PLT) or the adjusting nuts on the control rods (RST90 / RST90PGT). RS90P / RS90 PLT 1. Check the control rod leng th using the scale on the special wrench as shown. TIP In order to obtain a preci[...]

Control functions 44 TIP Make sure that the special wrench is securely fitted on the locknut. RST90 / RST90PGT W ARNING EWS00770 The left and right adjusting nuts must be set to the same position. Uneven settings can cause poor handling and loss of sta- bility. 1. Loosen the lockn ut w hile holding the ad - justing nut. 2. To increase weight transf[...]

Control functions 45 3. Tighten the lo cknut while holding th e ad- justing nut in place. NOTICE: Always tighten the locknut against the adjust- ing nut, and then tighten t he locknut to the specified torque. [ECS00 860] 1. Lockn ut 2. Control rod adjusting n ut 3. Standard position 4. Adjustable r ange 5. Red paint area Lock nut tig htening torque[...]

Pre-operation checks 46 ESU11071 Inspect your vehicle each tim e you use it to make sure the vehicle i s in safe operating c ondition. Always follow the inspection and mai ntenance procedures and schedules described in the Owner ’ s Manual. W ARNING EWS00191 Failure to inspect or maintain the vehicle properly increases the possibility of an acci-[...]

Pre-operation checks 47 Drive track • Check the defl ection. • Adjust if nec essar y . • Check f or wear and dam age. • If necessar y , have a Y a maha dealer replace track. 98 Slide runners • Check f or wear and dam age. • If necessar y , have Y amaha dealer replace slide runners. 98 Steering • Check f or excessive free pla y . 97 Li[...]

Operation 48 ESU13500 Read the Owner ’ s Manual carefully to be- come familiar with al l controls. If there is a control or function you do not understand, ask your Yamaha dealer. W ARNING EWS00201 Failure to familiarize yourself with the con- trols can lead to loss of control, which could cause an accident or injury. ESU13212 TIP This model is e[...]

Operation 49 4. Warm up the engine until it runs smooth- ly. 5. Be sure the low coolant temperature indi - cator light has gone out before operation. (See page 18 for detailed information about the indicator li ght.) RST90 1. Apply the parking brake. 2. Be sure the engine stop switch is in the run position. The starter motor cannot be operated when[...]

Operation 50 5. Warm up the engine, and then close the starter (choke) leve r when the engine runs smoothly. 6. Be sure the low coolant temperature indi - cator light has gone out before operation. (See page 18 for detailed information about the indicator li ght.) ESU11310 Break- in There is never a more important period in the life of your engine [...]

Operation 51 Pay particular attent ion to the safety informa - tion on page 6. Please read all w arning and notice label s on your snowmobil e . Also, read the Snowmobil - er ’ s Sa fety Handbook that i s supplied with your snowmobile. Learning to ride y our snowmobile Before you ride, always perform the pre-oper- ation checks listed on page 46. [...]

Operation 52 er speeds or in tighter curves. Lean more as the turn gets s harper or is made at higher speeds. Improper riding techniques such as abrupt throttle changes, excessiv e braking, incorrect body movements, or too much speed for the sharpness of the turn may cause the snow- mobile to tip. If your snowmobile begins to tip while turning, lea[...]

Operation 53 Trav ersing a slop e W ARNING EWS00251 Driving across the face of a slope ( “ si de- hilling ” ) can lead to overturn or loss of control if proper techniques are not used. Follow these instructions to reduce your risk of an accident. Do not t ry steeper or more difficult inclines until you have de- veloped your skill on gentle slop[...]

Operation 54 track, slide runners, and drive sprockets. Op- eration of the snowmobil e on the following surfaces should be avoid ed at all times: ● Dirt ● Sand ● Rocks ● Gras s ● Bare pavement Other surfaces that should be a v oided for the sake of drive track and slide runn er life are: ● Glare ice surfaces ● Snow mixed with a lot of[...]

Operation 55 around the already weakened area. To mini- mize possible damage , consult your stud manufacturer for installation and stud pattern recommendations. Yamaha does not recommend track stud- ding. ESU11395 Driving W ARNING EWS00300 Be sure to read the “ SAFETY INFORMA- TION ” section on page 6 and the “ Riding your snowmobile ” sect[...]

Operation 56 TIP The reverse buzzer beeps w hile the shift lever is in reverse. 2. While squeezing the brake lever, release the parking brak e by moving the parking brake lever to the right, and then release the brake lever. 3. Squeeze the throttle lever slowly to start out. 4. Turn the handlebar in the desired direc - tion. 5. Squeeze the brake le[...]

Operation 57 ● If transporting the snowmobile in an open trailer or truck, put a tight fitting cover on the snowmobile. A cover specificall y designed for your snowmobile is best. This will help keep foreign objects out of the c ooling vents, and also h elp protect the snowmo- bile against damage from debris on the road. ● If transporting the s[...]

Periodic mainte n ance and adjustment 58 ESU11452 Periodic inspection, adjustment, and lubrication will k eep your snowmobile in the safest and most efficient condi t ion possible. Safety is an obligation of the vehicle owner/operator. The most important points of v ehicle inspection, adjustment, and lubrication a r e explained on the following pag[...]

Periodic maintenance a nd adjustment 59 ESU11461 Periodic m aintena nce char t for the emi ssion co ntrol sy stem Items marked with an asterisk should be performed by a Yamaha d ealer as they require special tools, data and technical sk ills. ITEM REMARKS INITIAL EV ER Y PA G E 1 month or 800 km (500 mi) (40 hr) Season ally or 4000 km (2500 mi) (20[...]

Periodic mainte n ance and adjustment 60 ESU11564 General maintenance and lubrication chart ITEM REMARKS INITIAL EV ER Y PA G E 1 month or 800 km (500 mi) (40 hr) Season ally or 4000 km (2500 mi) (200 hr) Engine oil • Change (warm engine before draining). 78 * Engine o il filter car- tridge • Replace. Ev er y 20000 km (12000 mi) 78 * Cooling sy[...]

Periodic maintenance a nd adjustment 61 TIP Brake system: ● After disassembling the master cylinder or caliper c ylinder, always change the b r ake fluid. Regularly check the brake fluid le vel and add fluid if necessary. ● Replace the oil seal s of the master cylinder and caliper cy linder every two years. ● Replace the brake hose every four[...]

Periodic mainte n ance and adjustment 62 ESU14112 Tool kit RS90P / RS90 PLT / RST90 The owner ’ s tool kit is located in the storage compartment. (See page 32 for information on how to access the st orage compartment.) The service information includ ed in this man- ual and the tools provided in the owner ’ s tool kit are intended to assist you [...]

Periodic maintenance a nd adjustment 63 TIP If you do not h ave a torque wrench available during a servic e operation requiring one, take your snowmobile to a Yamaha dealer to check the torque settings and adjust them if necessary. ESU14230 Recommended equipment It is good prac tice to carry the spare parts and other necessary equipm ent with you w[...]

Periodic mainte n ance and adjustment 64 Left and right side covers To remove a side cover 1. Remove the shroud. (See the abov e pro- cedure.) 2. Loosen the fasteners, pull outward on the areas shown, and then slide the side cov- er forward to remove it. To install a side cover 1. Fit the projection on the rear of the side cover into the hole in th[...]

Periodic maintenance a nd adjustment 65 3. Remove the screws, and then remove the cable guide. 4. Loosen the quick fastene r screws. 5. Lift up the rear of the top cover, discon- nect the main switch coupler, and then remove the cover . To install the top cover 1. Connect the main switch coupler. 2. Place the top cover in the origi nal posi- tion, [...]

Periodic mainte n ance and adjustment 66 ● When installing the shroud and covers, be sure to tighten the fasteners secur e- ly. Top cover (RST90PGT) To remove the top cover 1. Remove the shroud and the left side cov - er. (See the above procedures.) 2. Disconnect the auxiliary DC jack coupler. 3. Remove the screws, and then remove the cable guide[...]

Periodic maintenance a nd adjustment 67 3. Tighten the quick fastener sc rews. 4. Place the windshield stay rubber covers in their o r iginal posi tion. 5. Pass the brake hose, throttle cable, park- ing brake cable and wire harness through the cable guid e, place the cable guide in the original position, and then install the scre ws. 6. Connect the[...]

Periodic mainte n ance and adjustment 68 To install the right side cover 1. Place the right side c over in the original position, and then tighten the bolts and scre ws. 2. Close the shroud. NOT ICE ECS01040 ● Make sure that all cables, leads, and hoses are routed properly before clos- ing the shroud and installing the right side cover. ● When [...]

Periodic maintenance a nd adjustment 69 When installing the s park plug, always clean the gasket surface. Wipe off any grime from the threads and tighten the spark plug to the specified torque. NOT ICE ECS00382 Make sure that the spark plug caps are se- curely installed. Otherwise t he spark plug caps could be damaged due to engine vi- bration. ESU[...]

Periodic mainte n ance and adjustment 70 5. Loosen the locknut. 6. To increase the throttle lever f ree play, turn the adjusting bolt in direction (a). To decrease the throttle leve r free play, turn the adjusting bolt in direction (b). 7. Tighten the locknut. 8. Install the headlight un it, making sure to fit the slots on its bottom onto the proje[...]

Periodic maintenance a nd adjustment 71 2. Open the shroud. 3. Loosen the locknut. 4. To increase the throttle lever f ree play, turn the adjusting bolt in direction (a). To decrease the throttle leve r free play, turn the adjusting bolt in direction (b). 5. Tighten the locknut. 6. Close the shroud. RST90PGT 1. Place the snow mobile on a level surf[...]

Periodic mainte n ance and adjustment 72 7. Tighten the locknut. 8. Install the headlight un it, making sure to fit the slots on its bottom onto the projec- tions on its sta y. 9. Fit the weatherstrip on the headlight unit into the recess in the top of the air filter case cover . 10. Install the headlight unit bolts and wind- shield stay bolts, and[...]

Periodic maintenance a nd adjustment 73 Check the T.O.R.S. for proper operation. 1. Start the engine. TIP Refer to the “ Starting the engine ” section on page 48. 2. Hold the pivot point of the throttle lever away from the th rottle switch by putting your thumb (above) and fo refinger (be- low) between the throttle lever pivot and the engine st[...]

Periodic mainte n ance and adjustment 74 RS90P / RS90 PLT 1. Place the snow mobile on a level surface and apply the parking brake. 2. Remove the s hroud, the left and right side covers, and the top cover. (See page 63 for removal procedure s.) 3. Remove the h eadlight unit bolt on each side of the snowmo bile. 4. Unhook the headlight unit as s hown[...]

Periodic maintenance a nd adjustment 75 8. Install the headlight un it, making sure to fit the slots on its bottom onto the projec- tions on its sta y. 9. Fit the weatherstrip on the headlight unit into the recess in the top of the air filter case cover . 10. Install the headlight unit bolts, and then tighten them to the specified torque. 11. Insta[...]

Periodic mainte n ance and adjustment 76 5. Place the ai r filter eleme nt frame in the original position. 6. Install the air filter case cover and attach the air filter case by hooking all the fas - teners. 7. Close the shroud. RST90PGT 1. Place the snow mobile on a level surface and apply the parking brake. 2. Remove the shroud and the top cov er[...]

Periodic maintenance a nd adjustment 77 7. Place the ai r filter eleme nt frame in the original position, and then install the air filter case cover by hooking the fasteners. 8. Install the headlight un it, making sure to fit the slots on its bottom onto the projec- tions on its sta y. 9. Fit the weatherstrip on the headlight unit into the recess i[...]

Periodic mainte n ance and adjustment 78 Remember: Less air at higher a ltitude means there is less horsepower available , even with the optimal air/fuel ratio. Expect acceleration and top speed to be reduced at higher altitudes. To overcome operating with less power at high altitudes, y our snowmobile may a lso re- quire different settings for the[...]

Periodic maintenance a nd adjustment 79 3. Remove the s hroud and the right side cover (RS90P / RS90PLT / RST90PGT), or open the shroud (RST90). [See page 63 (RS90P / RS90PLT / RST90PGT) or page 67 (RST90) for the procedures.] 4. Disconnect the oi l level gauge coupler. NOTICE: D isconnect the oil level gauge coupler before removing the oil filler [...]

Periodic mainte n ance and adjustment 80 6. If the engine oil is below the “ L ” level mark, add sufficient oil of the recom - mended type to raise it to the “ H ” level mark. (See page 123 for the recommend- ed oil.) NOTICE: When adding the en- gine oil, be careful not to fill above the “ H ” level mark on the dipstick. Use only the re[...]

Periodic maintenance a nd adjustment 81 RS90P / RS90PLT / RST90PGT RST90 8. Remove the oi l filler cap and the cylinde r head cap, and then remove the engine oil drain bolt and its gasket to drain the oil from the oil tank. RS90P / RS90 PLT RST90 RST90PGT RS90P / RS90PLT / RST90PGT 1. Oil le vel gauge c oupler 2. Oil fill er cap 1. Oil le vel gauge[...]

Periodic mainte n ance and adjustment 82 RST90 9. Place an oil pan under the engine to col- lect the used oil. 10. Remove the engine oil drain bol t and its gasket to drain the oil from the crank- case . TIP ● A “” mark is stamped on the crank case near the engine oil drain bolt for ea sy iden- tification. ● Dispose of used oil according to[...]

Periodic maintenance a nd adjustment 83 15. Add 2.0 L (2.11 US qt, 1.76 Imp.qt) of the recommended en gine oil to the oil tank, and then install and tighten the oil filler cap and the cylinder head c ap. 16. Start the engine, warm it up for several minutes, and then turn it off. 17. Remove the oil filler cap, and th en add sufficient oil o f the re[...]

Periodic mainte n ance and adjustment 84 the engine off and make sure that the en - gine oil drain bolts, the c y linder head cap, and the oil filler cap are installed correct- ly. 20. Turn the engine off, and t hen connect the oil level gauge coupler. NO TICE: If oil is leaking or the oil level warning indica- tor comes on when the engine is run- [...]

Periodic maintenance a nd adjustment 85 RST90PGT RS90P / RS90 PLT To ch eck t he co olant leve l 1. Place the snow mobile on a level surface and apply the parking brake. 2. Remove the top cover and the right side cover. (See page 63 for removal proce- dures.) 3. Check th e coolant leve l in the coolant re - covery tank when the engine is col d. I f[...]

Periodic mainte n ance and adjustment 86 4. Remove the coolant recovery tank cap, add the recom m ended coolant un til it reaches the “ COLD LEVEL ” mark, and then install the cap. 5. Start the engine, allow it to idle for several minutes, and then turn it off. 6. Check for any coolant lea kage. If coolant is leaking, check f or the cause. TIP [...]

Periodic maintenance a nd adjustment 87 RST90 RST90PGT 4. Install the right side cove r and the shroud (RST90PGT), or close the shroud (RST90). Bleeding the c ooling system The cooling sy stem must be bled if the cool- ant reservoir become s empty, if air can be seen in the coolant reservoir, or if there is a cooling system l eak. Consult a Yamaha [...]

Periodic mainte n ance and adjustment 88 RST90 RST90PGT 4. Start the engine and add coolant until the coolant level stabilizes , and then stop the engine. 5. Check for any coolant lea kage. If coolant is leaking, check f or the cause. TIP If you find any leaks, consult a Yamaha deal- er. 6. Fill the coolant reservoir w ith coolant until it reaches [...]

Periodic maintenance a nd adjustment 89 3. Install the drive guard, an d then install the left side cover and the shroud (RS90P / RS90PLT / R ST90PGT), or close the shroud (RST90). To replace and adjust the V-belt W ARNING EWS00411 When installing a new V-belt, make sure that it is positioned properly. Otherwise, the V-belt clutch engagement speed [...]

Periodic mainte n ance and adjustment 90 6. Remove the V-belt from the se condary sheave assem bly and primary sheave assembly. 7. Temporarily install the new V-belt on the secondary sheav e assembly only, and then measure the V-belt position. Do not force the V-belt betw een the s heaves; the secondary slid ing and fixed sheaves must touch each ot[...]

Periodic maintenance a nd adjustment 91 9. Tighten the V-belt position a djusting bolts. 10. Install the V-belt over the primary s heave assembly. 11. Rotate the secondary sliding sheave clockwise and push it s o that it separates from the secondary fixed sh eave. 12. Install the V-belt between the se condary sliding and fixed shea ves. 13. Place t[...]

Periodic mainte n ance and adjustment 92 RST90 4. Remove the dipstick and chec k that the oil is betw een the m aximum and mini- mum level m arks on the “ REVERSE ” side of the dipstick. If the oil is below the minimum level mark, add suffic ient oil of the recommended type to raise it to the maxi mum leve l m ark. NOTICE: Make sure that no for[...]

Periodic maintenance a nd adjustment 93 4. While holding the chain tension adjusting bolt with a wrench, tighten the locknut to the specified torque. 5. Install the right side cove r and the shroud (RS90P / RS90PLT / RST90PGT), or close the shroud (RST90). ESU13934 Brake and parking brake W ARNING EWS00440 ● A soft, spongy feeling in the brake le[...]

Periodic mainte n ance and adjustment 94 1. Remove the s hroud and the right side cover (RS90P / RS90PLT / RST90PGT), or open the shroud (RST90). [See page 63 (RS90P / RS90PLT / RST90PGT) or page 67 (RST90) for the procedures.] 2. Check the parking brake pads for wear by measuring the thic kness of the pads. I f the parking brake pads reach the wea[...]

Periodic maintenance a nd adjustment 95 7. Tighten the parki ng brake pad adjusting bolt locknu t . 8. Install the right side cove r and the shroud (RS90P / RS90PLT / RST90PGT), or close the shroud (RST90). Checking the brake fluid level Before riding, check that the brake fluid is above the lower level. Check the brake fluid level with the top of [...]

Periodic mainte n ance and adjustment 96 To m easur e the d rive s pr ocket w ear Measure the drive sprocket tooth width at the measuring line s hown. If the tooth width i s 13 mm (0.51 in) or less, replace the drive sprock - et. ESU12144 Skis and ski runners Check the skis and ski runn er s for wear and damage. Replace if necessa r y. NOT ICE ECS0[...]

Periodic maintenance a nd adjustment 97 TIP Move the front tip of each ski fully inward be- fore measuring or aligning. 3. If the alignmen t is not correct, consult a Yamaha dealer. ESU12164 Steeri ng syst em Check the handlebar for excessiv e fr ee play. To ch eck the h andle bar 1. Push the hand lebar up and down and back and forth. 2. Turn the h[...]

Periodic mainte n ance and adjustment 98 4. Tighten the front handlebar bolts to the specified torque, and then tighten the rear handlebar bolts to the specified torque. NOTICE: Make sure each han- dlebar holder is installed so that the smaller gap is facing forward. [ECS00 582] 5. Install the handlebar cover. ESU13702 Drive trac k and slide runner[...]

Periodic maintenance a nd adjustment 99 Adjust or replace if necessary. (See the fol- lowing section for more detai ls.) Checking the drive track alignm ent 1. Lift the rear of the snowmobile onto a suit- able stand to raise the driv e track off the ground. 2. Start the engine and rotate the driv e track one or two turns. Stop the engine. 3. Check [...]

Periodic mainte n ance and adjustment 100 2. Lift the rear of the snowmobile onto a suit- able stand to raise the driv e track off the ground. 3. Start the engine and rotate the driv e track one or two turns. Stop the engine. 4. Loosen the lock nut on the left and the right sides of the snowmobile, then align the drive track b y turning the adjusti[...]

Periodic maintenance a nd adjustment 101 6. Tighten the locknu ts to their specified torque. 7. Recheck alig nment and deflection. If nec- essary, repeat steps 3 to 6 until the prop- er adjustment is achiev ed. 8. Lower the snowmobile to the ground. 9. Tighten the rear axle nut. Adjusting the drive track alignm ent and de- flection (RST90 / RST90PG[...]

Periodic mainte n ance and adjustment 102 Shifted to left 5. Adjust the drive tra ck deflection to speci - fication. NOT ICE: The right and left ad- justing nuts should be turned an equal amount. [ECS005 92] 6. Recheck alig nment and deflection. If nec- essary, repeat steps 3 to 5 until the prop- er adjustment is achiev ed. 7. Lower the snowmobile [...]

Periodic maintenance a nd adjustment 103 RS90P RS90P LT 1. Lubrication point 1. Throttle cable end 1. Grease nipple 1 1. Grease nipple 1. Grease nipple 1. Grease nipple 1 1 1 U8HV10E0.book Page 103 Monday, May 16, 2011 1:15 PM[...]

Periodic mainte n ance and adjustment 104 RST90 RST90PGT ESU14181 Replacing a headlight bulb RS90P / RS90 PLT 1. Remove the top cover. (See page 63 for removal procedures.) 2. Remove the screws, and then remove the headlight access panel. 3. Disconnect the hea dlight coupler. 4. Remove the bulb holder cover. 5. Unhook the bul b holder, and then rem[...]

Periodic maintenance a nd adjustment 105 the glass part of the bulb or its life and illumination will be affected. If the glass is oil stained, thoroughly clean it with a cloth moistened with alcohol or lacquer thinner. [ECS006 21] 7. Install the bulb holder cover, and then connect the headlight coup ler. 8. Install the headl ight access panel, and[...]

Periodic mainte n ance and adjustment 106 3. Unhook the headlight unit as s hown, then lift it up and move it forward, away from the handlebar. NOTICE: Be careful not to scratch the snowmobile w hen mov- ing the headlight unit. [ECS009 20] 4. Disconnect the he adlight coupler. 5. Remove the bulb ho lder cover. 6. Unhook the bul b holder, and then r[...]

Periodic maintenance a nd adjustment 107 10. Fit the weatherstrip on the headlight unit into the recess in the top of the air filter case cover . 11. Install the headlight unit bolts and wind - shield stay bolts, and then tighten them to their specified torques. 12. Install the top cover and the shroud. ESU14150 Adjusting the headlight beam s RS90P[...]

Periodic mainte n ance and adjustment 108 3. Close the shroud. ESU12290 Fittings and fasteners Check the tightness of the fittings and fasten - ers. Tighten in prop er sequence and torque if nec- essary. ESU14020 Battery The battery is located u nder the air filter case. (See page 109.) This model is equipped with a VRLA (Valve Regulated Lead Acid)[...]

Periodic maintenance a nd adjustment 109 ESU14193 Replacing a fuse W ARNING EWS00550 Be sure to use the specified fuse. A wr ong fuse could cause electr ical system dam- age or A FIRE HAZARD. NOT ICE ECS00631 Be sure to tur n the main swit ch to the off position and disconnect the negative bat- tery lead to prevent accidental short-cir- cuiting. RS[...]

Periodic mainte n ance and adjustment 110 5. Loosen the joint clamp bo lts. 6. Slide the oil tank breather hose clamp away from the air filter case, and then dis - connect the oil tank breather hose . 7. Lift up the air filter case, disconnect the ISC (Idle Speed Control) unit inlet hose and cylinder head breather hose from the case, and then remov[...]

Periodic maintenance a nd adjustment 111 10. Replace the blown fuse with one of the proper amperage. RS90P / RS90PLT 1. Negative battery lead 1. Spare fuse 2. Fuel injection system fuse 3. Main fuse 4. EPS fuse 1 1 2 3 4 1. Fuse box 2. “ IGN ” (ignit ion) fuse 3. “ FA N ” (radiator f an) fuse 4. “ S/H ” (helmet shield heater jack) fuse [...]

Periodic mainte n ance and adjustment 112 RST90PGT 11. Connect the negativ e battery lead by in- stalling the bolt. 12. Install the battery cover, and then hook the battery band onto the holder. 13. Install the air filter case by reversing the removal steps 4 – 7. 14. Install the headlight uni t , making sure to fit the slots on its bottom o nto [...]

Periodic maintenance a nd adjustment 113 15. Fit the weatherstrip on the headlight unit into the recess in the top of the air filter case cover . 16. Install the headlight unit bolts and wind - shield stay bolts (RST90PGT), and then tighten them to their specified torques . 17. Install the top cover, the left and right side covers, and the shroud. [...]

Periodic mainte n ance and adjustment 114 6. Slide the crankcase breather hose c lamp (crankcase sid e) up, and then disconnect the crankcase breather hose from the en- gine. 7. Lift up the air filter case, slide the crank- case brea ther hose clamp (air filter case side) down, disconnect the crankcase breather hose from the ai r filter case, and t[...]

Periodic maintenance a nd adjustment 115 10. Connect the negative ba ttery lead. 11. Install the air filter case by reversing the removal steps 3 – 7. NOTICE: Be sur e to connect the breather hoses securely when installing the air filter case. [ECS006 41] TIP When installing the air filter case, connect the crankcase breather hose to the air filt[...]

Troubleshooting 116 ESU14163 Engine turns over but does not start 1. Fuel system ● No fuel supplied to combus tion cham- ber • No fuel in tank: Supply fuel. ↓ • Clogged fuel line: Clean fuel line. ↓ • Clogged injector (RS90P / RS90PLT / RST90PGT): Ask a Yamaha deal er to check. • Clogged carburetor (RST90): Clean carburetor. ● Fuel [...]

Troubleshooting 117 3. Compression ● Insufficient • Loose cylinder head nuts: Tighten nuts properly. ↓ • Worn or damaged gasket: Replace gasket. ↓ • Worn or damaged piston and cylin - der: Ask a Yamaha deal er to check. Disch arged bat tery If the battery is discharged, the engine can be started using a fully-charged 12-volt battery and[...]

Troubleshooting 118 4. Pull the red (+) connecting le ad cover to expose the terminal through the slit in the cover, and then connec t the red (+) jump- er cable to the red (+) connecting lead. 5. Connect the other end of the red (+) jumper cable to the positive (+) terminal of the booster battery. 6. Connect the bla ck ( – ) jumper cab le to the[...]

Troubleshooting 119 ● Seized engine: Seizure is caused by poor lubrication, inadequate fuel, or an air leak. Ask a Yamaha dealer to che ck. ● RST90: “ Hydrostatic lock ” occ urs when fuel has filled cylinders d uring transportation of vehicle: Remov e spark plugs and turn en- gine over several times with ignition off to expel exces s fuel. [...]

Troubleshooting 120 ● Worn or damaged drive track: Ask a Yamaha dealer to check. U8HV10E0.book Page 120 Monday, May 16, 2011 1:15 PM[...]

Storag e 121 ESU13940 Long-term storage requires s ome preventive procedures to guard against deterioration. Cleaning Thoroughly clean the snowmobile, inside and out, to remove the c orr osive salts and acids that can accumulate. Use Yam aha Mud, Grease, and Engine C leaner, or an eq uivalent product, to loosen mud, grease, and grime. Wash with mil[...]

Storage 122 od is to remove the intake silencer (RS90P / RS90PLT / RST90PGT) or air filter case (RST90), and squirt oil into the throttle bodies (RS90P / RS90PLT / RST90PGT) or carbure- tor throats (RST90) while the engin e is run- ning. NOTIC E: Do not simply start the engine when in storage, starting the en- gine occasionally during the storage p[...]

Specifications 123 ESU1246C Dimensions: Overall length: RS90P 2815 m m (110 .8 in) RS90PL T 3015 mm (1 18.7 i n) RST 90 3135 mm (123 .4 in) RST 90PGT 3 195 mm (125. 8 in) Overall width: RS90P 1200 m m (47. 2 in) RS90PL T 1200 mm (47.2 i n) RST 90 1225 mm (48.2 in) RST 90PGT 1 200 mm (47.2 in) Overall heigh t: RS90P 1210 m m (47. 6 in) RS90PL T 1210[...]

Specifications 124 Overa ll reduct ion ratio: RS90P 6.02 – 1.5 8 : 1 RS90PL T 6.18 – 1. 63 : 1 RST90 6. 74 – 1.77 : 1 RST90P GT 6.4 4 – 1.70 : 1 Sheave dist ance: 267.0 – 27 0.0 mm (10 .51 – 10 .63 in) Sheave offs et: 13.5 – 16.5 mm (0.53 – 0.65 in) Engage ment speed (Subject to ch ange accor ding to e levation setti ngs.): RS90P 31[...]

Specifications 125 Tail/br ake light : RS90P LED RS90PLT LE D RST90P GT LED Meter lig hting: RST9 0 14 V, 50 mA × 6 Meter lig hting: RS90P LED RS90PLT LE D RST90P GT LED High beam indic ator lig ht: RST9 0 14 V, 80 mA × 1 High beam indic ator lig ht: RS90P LED RS90PLT LE D RST90P GT LED Warn ing ligh t: RS90P LED RS90PLT LE D RST90P GT LED Warn i[...]

Consumer information 126 ESU12481 Identification number records Record the frame serial number, engine serial number (Primary ID), an d key identification number in the s paces provided for assistance when ordering spare parts from a Yamaha dealer. Also, record and keep the ID n umbers in a separate place in case the snowmobile is sto- len. Frame s[...]

Consumer information 127 ESU13461 Vehicle Emission Control Infor- mation labe l RS90P / RS90 PLT RST90 RST90PGT The Vehicle Emission Control Information la- bel is affixed at the location in the illustration. This label shows specifications related to ex- haust emissions as required by federal law, state law and Environment C anada. 1. V ehicle Emi[...]

Consumer information 128 ESU12500 YAMAHA MOTOR CORPORATION, U .S.A. SNOWMOBILE LIMIT- ED WARRANTY Yamaha Motor Corporation, U.S.A . hereby warrants that new Yamaha snowmobiles purchased from an autho- rized Yamaha snowmo bile dealer in the con tinental United States will be free from defects in material and workman- ship for the period of time stat[...]

Consumer information 129 YAMAHA MOTOR CORPORATION, U.S.A. MAKES NO OTHER WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED. ALL IMPLIED WAR- RANTIES OF MERCHANTABILITY AND FIT- NESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE OBLIGATIONS AND TIME LIM- ITS STATED IN THIS WARRANTY ARE HEREBY DISCLAIMED BY YAMAHA MOTOR CORPO- RATION, U.S.A. AND EXCLUDED FROM T[...]

Consumer information 130 Q. What responsibility does my dealer have under this warranty? A. Each Yamaha snowmobile dealer is e xpected to: 1. Completely set up every new machine before sale. 2. Explain the operation, maintenance, and warranty requirements to your sat isfaction at the time of sale, and upon your request at any lat er date. 3. In add[...]

Consumer information 131 ESU12511 YAMAHA EXTENDED SERVI CE (Y.E.S.) U8HV10E0.book Page 131 Monday, May 16, 2011 1:15 PM[...]

Index A Air filter, checkin g .................. ........... ........ 73 Auxiliar y DC jack .. ........... ................. ........ 25 B Backrest (RST90 / RST90PG T) ....... ........ 31 Battery ....... ................. ............................ 1 08 Brake and parking b rake ............. ............. 93 Brake lever ..........................[...]

Index Shrou d an d righ t side cove r, opening and closing, removin g and installi ng (RST90) ........ .. 67 Skis and ski runners .................... ............. 96 Spark plugs , checking ...................... ........ 68 Specificati ons .................. ................. ...... 123 Starter (cho ke) leve r (RST90) ................ .. 12 Start[...]

U8HV10E0.book Page 3 Monday, May 16, 2011 1:15 PM[...]

ESU14240 F or your best o wnership experience, think Genuine Y amaha! Genuine Y amaha P ar ts – Genuine Y amaha replacement par ts are the exact same par ts as the ones or iginally equipped on your v ehicle, providing y ou with the perf ormance and durability you ha ve come to e xpect. Why settle f or after mar ket parts t hat ma y not provide fu[...]

PRINTED IN JAPAN 2011.05-0.8 × 1 CR DIC183 PRINTED ON RECYCLED PAPER ESU12520[...]