TECHNICAL DATA - ENGINE 97
Primary transmission 26:72
Clutch Multidisc clutch in oil bath/hydraulically activated
Gearbox 5-gear, claw shifted
Transmission ratio (250 XC EU/USA)
1st gear 14:30
2nd gear 16:26
3rd gear 18:24
4th gear 21:24
5th gear 22:21
Transmission ratio (250 EXC EU, 250 EXC SIX DAYS EU, 250 EXC AUS, 250 XC‑W USA)
1st gear 14:30
2nd gear 17:26
3rd gear 19:23
4th gear 20:20
5th gear 29:23
Ignition Kokusan E
Ignition point (BTDC) 1.9 mm (0.075 in)
Spark plug NGK BR 7 ES
Spark plug electrode gap 0.60 mm (0.0236 in)
Starting aid (250 EXC EU, 250 EXC SIX DAYS EU) Kickstarter
Starting aid Kickstarter and electric starter
15.5All 300 models
Design 1-cylinder 2-stroke engine, water-cooled, with reed intake and
exhaust control
Displacement 293 cm³ (17.88 cu in)
Stroke 72 mm (2.83 in)
Bore 72 mm (2.83 in)
Exhaust valve - Beginning of adjustment 5,500 rpm
Exhaust valve - end of adjustment with red auxiliary spring 7,300 rpm
Exhaust valve - end of adjustment with yellow auxiliary spring 7,800 rpm
Exhaust valve - end of adjustment with green auxiliary spring 8,300 rpm
Crankshaft bearing 1 grooved ball bearing/1 roller bearing
Conrod bearing Needle bearing
Piston pin bearing Needle bearing
Pistons Aluminum cast
Piston rings 2 rectangular rings
X (upper edge of piston to upper edge of cylinder) 0… 0.10 mm (0… 0.0039 in)
Z (height of control flap) 47.5 mm (1.87 in)
Primary transmission 26:72
Clutch Multidisc clutch in oil bath/hydraulically activated
Gearbox 5-gear, claw shifted
Transmission ratio (300 XC EU/USA)
1st gear 14:30
2nd gear 16:26
3rd gear 18:24
4th gear 21:24
5th gear 22:21
Transmission ratio (300 EXC EU, 300 EXC SIX DAYS EU, 300 EXC AUS, 300 XC‑W USA)
1st gear 14:30
2nd gear 17:26
3rd gear 19:23
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