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KTM 50 AC/LC manual

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Table of contents for the manual

  • Page 1

    50 AC/LC REPARATURANLEITUNG MANUALE DI RIPARAZIONE MANUEL DE REPARATION MANUAL DE REPARACION REPAIR MANUAL 2002-2006 Art.NR.: 3.206.028-E[...]

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    REPAIR MANUAL 2002-2006 50 AC/LC KTM Group Partner[...]

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    1 SERVICE-INFORMATIONS 2 GENERAL INFORMATION 3 REMOVING AND REFITTING ENGINE 4 DISASSEMBLING ENGINE 5 SERVICING INDIVIDUAL COMPONENTS 6 ASSEMBLING ENGINE 7 TROUBLE SHOOTING 8 TECHNICAL SPECIFICATIONS 9 PERIODIC MAINTENANCE SCHEDULE 10 WIRING DIAGRAM 11 12 13 14 15 16[...]

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  • Page 7

    Art.-Nr . 3.206.028 -E Repair manual KTM MINI 50 air/liquid cooled KTM REPAIR MANUAL IN LOOSE-LEAF FORM STORING THE REP AIR MANUAL IN THE BINDER – Put the index into the binder . – Put the front page of the repair manual (210x297 mm) into the transparent pocket provided for this purpose on the outside of the binder . – Put the spine label (17[...]

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  • Page 9

    Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E E XPLANATION - U PDATE Edition: 7/2005 This repair manual contains the following supplements: 3.210.24-E Repair Manual 50 AC/LC 5/2001 Basic version Model year 2002 3.210.64-E Updating of Rep.Manual 3.210.24-E 5/2002 Model year 2003 (Engine number with first digit „3“) 3.206.010[...]

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  • Page 11

    INTRODUCTION This repair manual offers extensiv repair -instructions and is an up-to-date version that describes the latest models of the series. However , the right to modifications in the interest of technical improvement is reserved without updating the current issue of this manual. A description of general working modes common in work shops has[...]

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    Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E REPLY FAX FOR REPAIR MANUALS W e have made every effort to make our repair manuals as accurate as possible but it is always possible for a mistake or two to creep in. T o keep improving the quality of our repair manuals, we request mechanics and shop foremen to assist us as follows:[...]

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  • Page 15

    2-1E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028-E GENERAL INFORMATION OPERATING RANGES OF THE CARBURETOR . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2 CLEANING AND STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 BLEEDING OILPUMP FOR SEPARATE LUBRICATION . . . . . . . . .[...]

  • Page 16

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  • Page 17

    B C D A 1 2 2-2E main jet jet needle jet needle idling jet idling jet throttle valve Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E Carburetor adjustment Basic information about original carburetor setting The original carburetor setting was adapted for an altitude of approx. 500 meters (1600 ft.) above sea level, and the ambien[...]

  • Page 18

    2-3E Clean your motorcycle regularly in order to keep its painted finish looking shiny and new . The best manner would be to use warm water that has been mixed with a commercially available washing detergent and a sponge. The hard dirt can be removed before with the help of a soft water jet. ! CAUTION ! N EVER CLEAN YOUR MOTORCYCLE WITH A HIGH - PR[...]

  • Page 19

    1 2 2 3 A 4 4 2-4E Bleeding oilpump for separate lubrication up to model 2003 Clamp oil lines 1 and 2 as shown. Add 2 stroke engine oil (for example Motorex Cross Power 2T) with a syringe until the bubble-free oil starts to leak out of the line 2 . After bleeding the oil pump, mount both oil lines and fill the oil tank with 2 stroke engine oil (for[...]

  • Page 20

    Changing front brake fluid (not Mini Adventure) – Move the hand brake cylinder into horizontal position. – Disassemble the cover 1 together with the rubber boot 2 from the brake fluid reservoir . – Press the brake caliper pistons all the way back. – Use a syringe to extract the used brake fluid and add fresh DOT 5.1 brake fluid (Motorex Bra[...]

  • Page 21

    Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E Changing rear brake fluid (50 SX, 50 Supermoto) – Move the vehicle in a vertical position. – Disassemble the cover 1 together with the rubber boot 2 from the brake fluid reservoir . – Press the brake caliper pistons all the way back. – Use a syringe to extract the used brake[...]

  • Page 22

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  • Page 23

    3-1E REMOVING AND REFITTING ENGINE Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028-E REMOVING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2 INSTALLING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4 INDEX 3[...]

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    1 2 3 4 5 6 3-2E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028-E Removing the engine NOTE: the following steps are shown on a model with LC-engine, on a model with AC-engine a few works are not necessary like draining coolant liquid, removing and mounting the radiator and the radiator shield, bleeding the cooling system. Clean the[...]

  • Page 26

    1 2 3 4 5 3-3E – Loosen retaining bolt on tank 1 and remove from tank together with the rubber grommet. – Lift tank from the frame. – Open chain joint 2 and remove chain. – Loosen hose clamp 3 of the intake flange on the carburetor , pull carburetor back and swing to the side. NOTE: if the carburetor is not being serviced, it does not need [...]

  • Page 27

    1 1 2 3 4 4 5 6 7 8 3-4E – Loosen hose clamp 1 and pull both hoses from their connections. – Unbolt radiator retaining bolt 2 and laterally remove radiator with water hoses from the frame. – Carefully pull socket connector 3 apart. – Detach both exhaust springs 4 with a suitable wrench, remove springs. – Unbolt the exhaust bracket on the [...]

  • Page 28

    1 2 3 4 3-5E – Install carburetor on the intake flange and tighten hose clamp 1 . – Place chain on rear sprocket and pinion, mount chain joint 2 and secure. NOTE: make sure the locking member runs in the right direction (see photo). The closed side of the safety device must point in the running direction. – Mount tank and bolt tight. Do not f[...]

  • Page 29

    1 2 3 3-6E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E – Attach connection 1 of the air filter box to the carburetor and tighten hose clamp. – Insert air filter element in the air filter box and mount cover . NOTE: the locating tabs in the cover must engage in the panel. – Mount seat. Make sure the retaining bracket 2 i[...]

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  • Page 31

    4-1E DISASSEMBLING THE ENGINE Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028-E SPECIAL TOOLS - ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2 FIXING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3 DRAINING GEAR OIL . . . . . . . . .[...]

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  • Page 33

    15 50 8 130 75 2 1 4 3 5 6 4-2E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E SPECIAL TOOLS ENGINE 50 AC/LC FIG PARTNUMBER DESCRIPTION 1 590.29.021.000 Puller for flywheel 2 451.12.021.000 Rotor holding tool 3 451.29.006.000 Adjusting plate for Dimension „X“ 4 6 899 785 Loctite 243 blue 5 451.29.075.000 T achometer 6 503.29[...]

  • Page 34

    1 2 3 4 5 5 5 6 7 4-3E Clamp the engine using a vice – Clean the engine thoroughly prior to disassembling. – The engine can be clamped with a vice, using a protective pad to clamp the lower rear bracket (see photo). Drain the transmission oil – Remove the transmission oil drain plug 1 including the sealing ring and allow transmission oil to d[...]

  • Page 35

    1 2 2 3 4 4 5 6 7 8 4-4E Remove ignition stator. – Pull cable guide 1 from the case. – Remove allan bolts 2 of the ignition stator 3 . – Carefully pull stator 3 out of the case. Remove cylinder head, cylinder and pistons. – Loosen bolts on cylinder head crosswise and remove. – Discard washers (LC-engine), remove cylinder head 4 . – Remo[...]

  • Page 36

    1 2 3 4 5 5 5 5 6 7 7 4-5E Pull off ignition rotor – Hold ignition rotor 1 with special tool 2 , open the nut and remove. NOTE: a washer is located under the nut; the magnetic attraction of the rotor causes it to adhere to the rotor . ! CAUTION ! M AKE SURE THE TWO PINS OF THE SPECIAL TOOL DO NOT CA TCH THE THREADED HOLES , OTHERWISE THE THREADIN[...]

  • Page 37

    1 1 1 1 2 3 4 5 6 7 8 9 4-6E Disassemble the clutch and primary drive – Rechuck the engine to provide access to the clutch side. – Remove kickstarter and bolts 1 on the clutch cover . – Remove clutch cover , discarding the seal.   WARNING   D O NOT REMOVE THE CIRCLIP 2 , OTHERWISE THE KICKST AR TER SPINDLE MAY F ALL FROM THE CASIN[...]

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  • Page 39

    5-1E SERVICING INDIVIDUAL COMPONENTS Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028-E RIGHT HOUSING HALF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2 LEFT HOUSING HALF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3 CRANKSHAFT . . . . . . . . . .[...]

  • Page 40

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  • Page 41

    1 2 3 S 5-2E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E Working on the right half of the engine case Remove shaft sealing ring 1 and heat the engine case half on a heating plate to approx. 150° C. NOTE: if the engine case is heated to 150° C and struck on a wooden surface, the bearings usually fall out of the bearing seats[...]

  • Page 42

    1 2 4 3 5-3E Working on the left half of the engine case Remove shaft sealing rings 1 / 2 and heat engine case halves on a heating plate to approx. 150° C. NOTE: – If the engine case is heated to 150° C and struck on a wooden surface, the bearings usually fall out of the bearing seats automatically . If necessary , the bearings must be pushed o[...]

  • Page 43

    1 2 6 7 8 9 3 4 5 5-4E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E Working on the clutch cover NOTE: dismantling the clutch cover is neccessary if parts are damaged or the O-ring is leaking. – T urn kickstarter shaft 1 counter -clockwise and remove ratchet gear 2 . Check gearing for wear . NOTE: If the kickstarter shaft is [...]

  • Page 44

    M 4 6 8 7 5 3 2 1 9 5-5E Overhaul the water pump (LC-engine) – Remove cover 1 , discard the O-rings. – Remove circlip 2 with a suitable wrench. – Remove the water pump wheel 3 from the pump shaft 4 . – Press out shaft 4 , press out both bearings ( 6 and 7 ). – Remove seal shaft ring 5 . NOTE: a spring 8 is installed starting with the 2004[...]

  • Page 45

    x y 10mm x y 50mm 5-6E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E MARK PISTON CYLINDER AC CYLINDER LC A 39.455 - 39.460 mm 39.515 - 39.520 mm 39.505 - 39.510 mm 1.5533 - 1.5535 in 1.5557 - 1.5559 in 1.5553 - 1.5555 in B 39.461 - 39.465 mm 39.521 - 39.525 mm 39.511 - 39.515 mm 1.5535 - 1.5537 in 1.5559 - 1.5561 in 1.5555 - 1.[...]

  • Page 46

    B A 1 2 3 4 5 6 7 6 6 5-7E Clutch new used Balancing the clutch wear – Check clutch shoes for wear; if the lining only shows minor signs of wear , the linings can be reinstalled. NOTE: – the centrifugal clutch has an outer diameter of approx. 82.5 mm (3.248 in) when new . – to compensate for minor wear in the lining, one of the preload washer[...]

  • Page 47

    6-1E ASSEMBLING THE ENGINE Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028-E MOUNTING THE CRANKSHAFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2 MOUNTING THE PRIMARY DRIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2 MOUNTING LEFT ENGINE HOUSING . . . . . . . . . . . . . .[...]

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    1 2 3 4 5 6 7 8 9 bk bl bl bl bl 6-2E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E Mounting the crankshaft and output shaft – Heat the engine case on a heating plate. – Lubricate both bearings, lightly grease the seal shaft ring. – Push the output shaft and crankshaft into the bearing. NOTE: the conrod must be in a verti[...]

  • Page 50

    1 2 3 4 5 5 6 7 S 8 9 6-3E – Wrap insulating tape around the output shaft in the area of the sharp edge 1 to prevent the seal shaft ring from being damaged. NOTE: wrap insulating tape just above edge to allow the tape to be easily pulled off after the seal shaft ring is mounted. – Grease the seal lip and press in the seal shaft ring. – Pull o[...]

  • Page 51

    2 3  2003 1 1 1 1 4 4 4 2 3 2004  6-4E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E Mounting the clutch cover – Put new seals in place and mount the clutch cover . – Bolt clutch cover into place with 6 bolts M6x25 1 , tighten the bolts to 10 Nm (7 ft.lb). Mount the ignition cover and water pump. – Put the dowels 7x[...]

  • Page 52

    1 3 4 2 6-5E Mount the pistons – Fix conrod with a mounting board. – Grease the conrod bearings and attach to conrod eye. – Mount pistons, the arrow on the bottom of the piston should point towards the outlet port. – Slide piston pin into the conrod eye by hand and mount piston pin lock with the open side facing down. – T urn the piston r[...]

  • Page 53

    1 1 2 3 4 6-6E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E Mount the cylinder head – Mount the cylinder head 1 , making sure the water connection is on the intake side (LC-engine). – Use new washers for the cylinder head bolts (LC-engine), tighten cylinder head bolts crosswise in 2 stages to 15 Nm (11 ft.lb). Mount water [...]

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  • Page 55

    7-1E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028-E TROUBLE SHOOTING TROUBLE SHOOTING 50 AC/LC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2 IGNITION MEASUREMENT 50 AC/LC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4 MEASUREMENT WITH PEAK VOLTAGE ADAPTER . . . . . . . . . . . [...]

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  • Page 57

    7-2E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E TROUBLE CAUSE REMEDY Engine fails to start Operating error Open fuel tap, replenish fuel, do not use choke Fuel supply interrupted Close fuel tap, loosen fuel hose at carburettor , lead into a basin and open fuel tap, – if fuel leaks out, clean carburettor – if no fuel leak[...]

  • Page 58

    7-3E TROUBLE CAUSE REMEDY Engine stalling or running with four stroke cycle Carburetor overflows if level adjust too high, float needle seating is dirty or enlarged Clean carburetor , if necessary replace float needle and adjust level Loose carburetor jets T ighten jets High rpm misfiring Incorrect heat range spark plug or low quality spark plug Re[...]

  • Page 59

    1 2 R S 7-4E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E Resistor values of the ignition system - Stator – Unplug the ignition stator and measure the resistance of the stator using a digital measuring tool. – The resistance must be 500 Ω ± 40 Ω at 20º C. NOTE: it is not neccessary to take the stator out of the engin[...]

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  • Page 61

    8-1E MODEL 2002 ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3 BASIC CARBURETOR SETTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3 CHASSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-4[...]

  • Page 62

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  • Page 63

    8-2E MODEL 2005 AC ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-10 BASIC CARBURETOR SETTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-10 CHASSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-11[...]

  • Page 64

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  • Page 65

    8-3E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E TECHNICAL DATA - ENGINE 50 AC/LC 2002 Engine 50 AC (aircooled) 50 LC (liquid cooled) Design single cylinder 2-stroke engine, with reed valve inlet Displacement 49,0 cm³ Bore/Stroke 39,5 / 40 mm Fuel SUPER fuel, research octane no 95, mixed with 2-stroke oil Oil/gasoline ratio [...]

  • Page 66

    8-4E TECHNICAL SPECIFICATIONS - CHASSIS 50 MINI 2002 50 SX PRO SENIOR LC single downtube, split-cradle Marzocchi Ø = 32 mm 175/185 mm (6.9/7.3 in) Central shock absorber WP PDS Disc brake Ø 160 mm (6.3 in) Drumbrake Ø 90 mm (3.5 in) front/rear 2.50x10" Pirelli MT 32 / 2.75x10" MT 320 front/rear: 1.0 bar / 1.0 bar 1,8 Liter 11 : 48 1/2x[...]

  • Page 67

    8-5E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E TECHNICAL DATA - ENGINE 50 AC/LC 2003 Engine 50 AC (aircooled) 50 LC (liquid cooled) Design single cylinder 2-stroke engine, with reed valve inlet Displacement 49,0 cm³ Bore/Stroke 39,5 / 40 mm Fuel SUPER fuel, research octane no 95, mixed with 2-stroke oil (separate lubricati[...]

  • Page 68

    8-6E TECHNICAL SPECIFICATIONS - CHASSIS 50 MINI 2003 50 SX PRO SENIOR LC single downtube, split-cradle Marzocchi Ø = 32 mm 175/185 mm (6.9/7.3 in) Central shock absorber WP PDS Disc brake Ø 160 mm (6.3 in) Drumbrake Ø 90 mm (3.5 in) 2.50x12" V eeRubber V270/ 2.75x10"V271 front/rear: 1.0 bar / 1.0 bar 1,8 Liter 11 : 48 1/2x3/16" 10[...]

  • Page 69

    8-7E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E TECHNICAL DATA - ENGINE 50 AC/LC 2004 50 SX PRO SENIOR LC single cylinder 2-stroke engine, with reed valve inlet 49,0 cm³ 39,5 / 40 mm Lead-free SUPER FUEL (ROZ 95), mixed with 2-stroke oil 1 : 40 when using high grade 2-stroke oil (Motorex 2T Cross Power) When in doubt, pleas[...]

  • Page 70

    8-8E BASIC CARBURETOR SETTING Model 50 MINI ADVENTURE (SEP ARA TE LUBRICA TION) 50 SENIOR ADVENTURE (MIXTURE LUBRICA TION) T ype Dell'Orto PHV A 12 XS Dell'Orto PHV A 14 DS Main jet 60 80 (70) Needle jet 211 F A 211 F A Idling jet 38 45 Jet needle A10 A10 Needle position from top 4. 3. Air/Mixture reg. screw open 4 3,5 Slide 40 40 Startin[...]

  • Page 71

    8-9E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E TECHNICAL SPECIFICATIONS - CHASSIS 50 MINI 2004 50 SX PRO SENIOR LC single downtube, split-cradle Marzocchi Ø = 32 mm 185/185 mm Central shock absorber WP PDS Disk brake Ø 160 mm Disk brake Ø 140 mm 2.50x12" Pirelli MT 32A 2.75x10" Pirelli MT320 1,0 bar / 1,0 bar 1[...]

  • Page 72

    8-10E TECHNICAL DATA – ENGINE 2005 AC ENGINE 50 AC SENIOR ADVENTURE 50 AC MINI ADVENTURE Design single cylinder 2-stroke engine, with reed valve inlet Displacement 49.0 ccm Bore/Stroke 39.5 / 40 mm Fuel Lead-free SUPER FUEL (ROZ 95), mixed with 2-stroke oil Lead-free SUPER FUEL (ROZ 95) Lubrication mixture lubrication separate lubrication Oil/gas[...]

  • Page 73

    8-11E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E TECHNICAL SPECIFICATIONS – CHASSIS 2005 AC CHASSIS 50 SENIOR ADVENTURE 50 MINI ADVENTURE Frame single downtube, split-cradle Fork Marzocchi Ø = 32 mm (1,26 in) Wheel travel front/rear 175/190 mm (6.9/7.5 in) 115/185 mm (4,5/7,3 in) Rear suspension Central shock absorber Pai[...]

  • Page 74

    8-12E TYP 50 SX PRO JUNIOR LC 50 SX PRO SENIOR LC Design single cylinder 2-stroke engine, with reed valve inlet Displacement 49.0 ccm Bore/Stroke 39.5 / 40 mm Fuel SUPER fuel, research octane no 95, mixed with 2-stroke oil Oil/gasoline ratio 1 : 40 when using high grade 2-stroke oil (Motorex 2T Cross Power) When in doubt, please contact your import[...]

  • Page 75

    8-13E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E 50 SX PRO JUNIOR LC 50 SX PRO SENIOR LC Frame single downtube, split-cradle Fork Marzocchi Ø = 32 mm (1.26 in) Wheel travel front/rear 140/205 mm (5.5/8 in) 185/185 mm (7.3/7.3 in) Rear suspension Central shock absorber WP Front brake Disk brake Ø 160 mm (6.4 in) Rear brake [...]

  • Page 76

    8-14E TECHNICAL DATA – ENGINE 2006 AC ENGINE 50 SENIOR ADVENTURE 50 MINI ADVENTURE Design single cylinder 2-stroke engine, with reed valve inlet Displacement 49.0 ccm Bore/Stroke 39.5 / 40 mm Fuel Lead-free SUPER FUEL (ROZ 95), mixed with 2-stroke oil Lead-free SUPER FUEL (ROZ 95) Lubrication mixture lubrication separate lubrication Oil/gasoline [...]

  • Page 77

    8-15E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E TECHNICAL SPECIFICATIONS – CHASSIS 2006 AC CHASSIS 50 SENIOR ADVENTURE 50 MINI ADVENTURE Frame single downtube, split-cradle Fork Marzocchi Ø = 32 mm (1,26 in) Wheel travel front/rear 175/190 mm (6.9/7.5 in) 115/185 mm (4,5/7,3 in) Rear suspension Central shock absorber Pai[...]

  • Page 78

    8-16E TYP 50 SX JUNIOR 50 SX, 50 SUPERMOTO Design single cylinder 2-stroke engine, with reed valve inlet Displacement 49.0 ccm Bore/Stroke 39.5 / 40 mm Fuel SUPER fuel, research octane no 95, mixed with 2-stroke oil Oil/gasoline ratio 1 : 60 when using high grade 2-stroke oil (Motorex 2T Cross Power) When in doubt, please contact your importer Lubr[...]

  • Page 79

    8-17E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E 50 SX JUNIOR 50 SX 50 SUPERMOTO Frame single downtube, split-cradle Fork Marzocchi Ø = 32 mm (1.26 in) Wheel travel front/rear 140/205 mm (5.5/8 in) 185/185 mm (7.3/7.3 in) Rear suspension Central shock absorber WP Front brake Disk brake Ø 160 mm (6.4 in) Rear brake Drum bra[...]

  • Page 80

    8-18E TOLERANCES AND FITTING CLEARANCES Crankshaft run out of crank stud max. 0.050 mm Crankshaft webs outer dimension 38 mm ±0.05 mm Conrod bearing radial play max. 0.030 mm Piston fitting clearance 0.055-0.065 mm (AC) / 0.045-0.055 mm (LC) Piston ring end gap max. 0.20 mm Clutch shoes outer diameter new 82.5 mm Clutch drum diameter max. 84.4 mm [...]

  • Page 81

    9-1E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028-E LUBRICATION AND MAINTENANCE SCHEDULE 50 AC/LC MODEL 2002 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-2 MODEL 2003-2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-4 MODEL 2006 . .[...]

  • Page 82

    9-2E M AINTENANCE WORK DONE BY KTM AUTHORISED WORKSHOPS IS NOT A SUBSTITUTE OF CARE AND CHECKS DONE BY THE RIDER ! PERIODIC MAINTENANCE 2002 50 MINIS air/liquid cooled A washed motorcycle can be checked more quickly which saves money! Service Service every every 5 hours 20 hours ENGINE Check engine for leaks  Change transmission oil  Check sp[...]

  • Page 83

    9-3E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E VITAL CHECKS AND CARE PROCEDURES TO BE CONDUCTED BY THE OWNER OR THE MECHANIC before each start after every cleaning for cross country use once a year Check transmission oil level  Check coolant level  Check brake fluid level  Check brake pads for wear  Check brake [...]

  • Page 84

    9-4E PERIODIC MAINTENANCE 2003-2005 50 MINIS air/liquid cooled A washed motorcycle can be checked more quickly which saves money! Service Service every every 5 hours 20 hours ENGINE Check engine for leaks  Change transmission oil  Check spark plug, change it if necessary , set electrode gap  Check the clutch engagement speed  CARBURETOR[...]

  • Page 85

    9-5E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E NOTE: I F THE INSPECTION EST ABLISHES THA T PERMISSIBLE TOLERANCES ARE EXCEEDED , THE RESPECTIVE COMPONENTS MUST BE REPLACED . VITAL CHECKS AND CARE PROCEDURES TO BE CONDUCTED BY THE OWNER OR THE MECHANIC before each start after every cleaning for cross country use once a year [...]

  • Page 86

    9-6E M AINTENANCE WORK DONE BY KTM AUTHORISED WORKSHOPS IS NOT A SUBSTITUTE OF CARE AND CHECKS DONE BY THE RIDER ! PERIODIC MAINTENANCE 2006 50 MINIS air/liquid cooled A washed motorcycle can be checked more quickly which saves money! Service Service before every every every 5 hours 20 hours race ENGINE Check engine for leaks   Change transmi[...]

  • Page 87

    9-7E Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E NOTE: I F THE INSPECTION EST ABLISHES THA T PERMISSIBLE TOLERANCES ARE EXCEEDED , THE RESPECTIVE COMPONENTS MUST BE REPLACED . VITAL CHECKS AND CARE PROCEDURES TO BE CONDUCTED BY THE OWNER OR THE MECHANIC before each start after every cleaning for cross country use once a year [...]

  • Page 88

    [...]

  • Page 89

    10-1E 10 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2 WIRING DIAGRAM INDEX Repair manual KTM MINI 50 air/liquid cooled Art.-Nr . 3.206.028 -E[...]

  • Page 90

    l i o c n o i t i n g i C L 0 5 r o i n e S X S - . d A i n i M black 4 0 0 2 . 2 0 . 0 2 G k c a l b n o t t u b p o t s k c a l b r o t a r e n e g 10-2E Cable colours: black = black[...]