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Engine 125 SX 125 EXC 200 SX 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 fuel with at least RON 95 (USA = Premium RON 91), mixed with high grade two stroke oil
Oil / gasoline ratio 1:40-1:60 when using high grade, two- stroke oil (Motorex Cross Power 2T). 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 one plain compression ring two plain compression rings
Dimension
“X“ 0,0 mm
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
Dimension
“Z“ 43 mm (1.67 in) 46 mm (1,81 in) 47 mm (1.85 in)
Primary drive straight cut spur gears, primary ratio 23:73
Clutch multiple disc clutch in oil bath, hydraulically operated (Motorex Kupplungs-Fluid 75)
Transmission
5
speed, claw actuated 6 speed, claw actuated
Gear ratio
1st gear 13 : 32 „1S32“ 12 : 33 „1G33“ 13 : 32 „1S32“ 13 : 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 „6G20“ 20 : 20 „6G20“ „6S22“ 20 : 23 „6S23“ „6G22“ 20 : 20 „6G20“
Gear lubrication 0.7 l engine oil (Motorex Top Speed 4T 15W50)
Available chain sprockets 13Z / 14Z / 15Z 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 KOKUSAN 2K-3
Gener
ator output no genaerator 12V / 110 W 12V / 110 W 12V 110 W
Ignition system USA KOKUSAN 2K-1 KOKUSAN 2K-2 KOKUSAN 2K-3 KOKUSAN 2K-2
Gener
ator output no genaerator 12V 40 W 12V / 110 W 12V 40 W
Carburetor flat-slide carburetor, carburetor setting see table
Air-filter wet foam type air filter insert
(upper edge piston-
upper edge cylinder)
(height of the
control flap)
TECHNICAL DATA – ENGINE 125 / 200 SX, EXC 2004