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KTM 125 Repair Manual

KTM 125
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Repair manual KTM 125 / 200
Art No 3.206.005 -E
9-14C
Engine 125 SX 125 EXC 200 MXC 200 EXC
Design Liquid-cooled single-cylinder two-stroke engine with intake and exhaust control
Piston displacement 124.8 ccm 193 ccm
Bore / stroke 54 / 54,5 mm (2.126 / 2.145 in) 64 / 60 mm (2.52 / 2.362 in)
Fuel unleaded SUPER fuel, research octane no 95, mixed with high grade two stroke oil
Oil / gasolin ratio 1:40-1:60 when using high grade two stroke oil (Shell Advance Racing X). When in doupt, please contact your importer
Crankshaft bearing 1 deep-groove ball bearing / 1 cylinder roller bearing
Connecting rod bearing needle bearing
Piston pin bearing needle bearing
Piston cast piston
Piston ring one plain compression ring two plain compression rings
Dimension "X" 0.0 mm (0.0 in) 0.50 - 0.55 mm (0.22 in)
Ignition timing 1.4 mm (0.055 in) (16.5°) BTDC 1.6 mm (0.063 in) (17°) BTDC
Spark plug NGK BR9 EVX NGK BR 8 EG
Electrode gap 0.60 mm (0,024 in)
Dimension "Z" 43 mm (1.67 in) 46 ,5 mm (1.83 in)
Primary drive straight cut spur gears, primary ratio 23:73
Clutch multiple disc clutch in oil bath, hydraulic operated (Shell HF-E15)
Transmission 6 speed, claw actuated
Gear ratio
1st gear 13 : 32 „1S32“ 12 : 33 „1G33“ 13 : 32 „1S32“ 12 : 33 „1G33“
2nd gear „2S15“ 15 : 30 „2S30“ „2S15“ 15 : 31 „2G31“ „2S15“ 15 : 30 „2S30“ „2S15“ 15 : 31 „2G31“
3rd gear „3S17“ 17 : 28 „3S28“ „3S17“ 17 : 28 „3S28“ „3S17“ 17 : 28 „3S28“ „3S17“ 17 : 28 „3S28“
4th gear „4S19“ 19 : 26 „4S26“ „4S19“ 19 : 26 „4S26“ „4S19“ 19 : 26 „4S26“ „4S19“ 19 : 26 „4S26“
5th gear „5S21“ 21 : 25 „5S25“ „5S21“ 21 : 25 „5S25“ „5S21“ 21 : 25 „5S25“ „5G17“ 21 : 25 „5G19“
6th gear „6S22“ 22 : 24 „6S24“ „6G20“ 20 : 20 „6G20“ „6S22“ 20 : 23 „6S23“ „6G22“ 20 : 20 „6G20“
Gear lubrication
0.7 l engine oil 20W-40 (Shell Advance VSX4)
0.7 l gear oil 80W (Shell Gear EP 80)
0.7 l engine oil 20W-40 (Shell Advance VSX4)
0.7 l gear oil 80W (Shell Gear EP 80)
Available chain sprockets 13t / 14t / 15t for chain
5
/8 x
1
/4"
Coolant 1.2 litres, 40% anti freeze, 60% water, at least -25 °C (-13 °F)
Ignition system KOKUSAN 2K-1 KOKUSAN 2K-3 KOKUSAN 2K-3
Generator output no generator 12V / 110 W 12V 110 W
Ignition system USA KOKUSAN 2K-1 KOKUSAN 2K-2
Generator output no generator 12V 40 W
Carburetor flat-slide carburetor, carburetor setting see table
Air-filter wet foam type air filter insert
200 EXC SEPARATE LUBRICATION
Lubrication Separate lubrication
Engine oil Shell Advance Ultra 2 or 2-stroke engine oil for a mixture ratio 1:50 and for separate lubrication
Oil tank 1,3 liter (0,34 US Gallons)
(upper edge piston-
upper edge cylinder
height of the
control flap
TECHNICAL DATA - ENGINE 125 / 200 2002

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KTM 125 Specifications

General IconGeneral
Bore x Stroke54 mm x 54.5 mm
StarterKickstarter
Transmission6-speed
Engine TypeSingle-cylinder, 2-stroke
Displacement124.8 cm³
Cooling SystemLiquid cooled
Fuel SystemCarburetor
LubricationPremix (oil-fuel mixture)

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