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TECHNICAL SPECIFICATIONS – ENGINE 250/300 XC/XC-W/EXC SIX DAYS/EXC 2007
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ENGINE
250 XC 250 XC-W/EXC SIX DAYS/EXC 300 XC 300 XC-W/EXC SIX DAYS/EXC
Design Liquid-cooled single-cylinder two-stroke engine
with KTM Twin Valve Control exhaust system and KTM Torque Chamber
Piston displacement 249 ccm 293.15 ccm
Bore / stroke 66.4 / 72 mm (2.62 / 2.84 in) 72 / 72 mm (2.84 / 2.84 in)
Fuel
unleaded fuel with at least RON 95 (USA = Premium RON 91), mixed with high grade two stroke oil (Motorex Cross Power 2T)
Oil / gasoline ratio
1:40 – 1:60 when using high grade, two- stroke oil.
When in doubt, please contact your importer or use 1:40 mix ratio to be on the safe side
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 two plain compression rings
Dimension „X“
0 + 0,1 mm (0 + 0.004 in)
Ignition timing 1,9 mm (0.074 in) BTDC
Spark plug NGK BR7 ES
Electrode gap 0,60 mm
Dimension „Z
“ 47,5 mm (1.87 in) 48,5 mm
TVC start open 5500/min 5200/min
TVC fully open 7000/min (red spring), 7500/min (yellow spring), 7900/min (green spring)
Primary drive straight cut spur gears, primary ratio 26:72
Clutch multiple disc clutch in oil bath, hydraulically operated (Brake fluid DOT 5.1)
Transmission 5 speed, claw actuated
Gear ratio
1st gear 14 : 30 14 : 30 14 : 30 14 : 30
2nd gear 16 : 26 17 : 26 16 : 26 17 : 26
3rd gear 18 : 24 19 : 23 18 : 24 19 : 23
4th gear 21 : 24 20 : 20 21 : 24 20 : 20
5th gear 22 : 21 29 : 23 22 : 21 29 : 23
Gear lubrication 0,7 liter Motorex Top Speed 4T 15W50
Available chain sprockets
13t / 14t for chain 5/8 x 1/4"
Coolant 1.2 litres, 50% anti freeze, 50% distilled water, at least -25 °C (-13 °F)
Ignition system KOKUSAN 2K-3 (EXC/EXC Six Days) KOKUSAN 2K-3 (EXC/EXC Six Days)
Generator output 12V / 110 W (EXC/EXC Six Days) 12V / 110 W (EXC/EXC Six Days)
Ignition system KOKUSAN 2K-2 (XC/XC-W) KOKUSAN 2K-3 (XC/XC-W)
Generator output 12V 40 W (XC/XC-W) 12V / 110 W (XC/XC-W)
Carburator 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