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22 TECHNICAL DATA 122
Second gear 15:31
Third gear 17:28
Fourth gear 19:26
Fifth gear 21:25
Sixth gear 20:20
Alternator 12 V, 75 W
Ignition Contactless controlled fully electronic ignition with digital igni-
tion adjustment, type Kokusan
Spark plug NGK BR9 ECMVX
Spark plug electrode gap 0.60 mm (0.0236 in)
Cooling Water cooling, permanent circulation of coolant by water pump
Starting aid Electric starter and kick starter
22.1.3 All 250 models
Design 1-cylinder 2-stroke engine, water-cooled, with reed intake and
exhaust control
Displacement 249 cm³ (15.19 cu in)
Stroke 72 mm (2.83 in)
Hole 66.4 mm (2.614 in)
Idle speed 1,400… 1,500 rpm
Exhaust valve, beginning of adjustment 5,250 rpm
Crankshaft bearing 1 grooved ball bearing/1 roller bearing
Conrod bearing Needle bearing
Piston pin bearing Needle bearing
Piston Cast aluminum
Piston rings 2 half keystone rings
X distance (upper edge of piston to upper edge of cylinder) 0… 0.10 mm (0… 0.0039 in)
Z distance (height of control flap) 49 mm (1.93 in)
Primary transmission 26:73
Clutch Multidisc clutch in oil bath/hydraulically activated
Transmission 6-gear, claw shifted
Transmission ratio
First gear 14:32
Second gear 16:26
Third gear 20:25
Fourth gear 22:23
Fifth gear 25:22
Sixth gear 26:20
Alternator 12 V, 110 W
Ignition system Contactless controlled, fully electronic ignition with digital igni-
tion adjustment, type Kokusan
Spark plug NGK BR 7 ES
Spark plug electrode gap 0.60 mm (0.0236 in)
Cooling Water cooling, permanent circulation of coolant by water pump
Starting aid Kick starter and electric starter
22.1.4 All 300 models
Design 1-cylinder 2-stroke engine, water-cooled, with reed intake and
exhaust control
Displacement 293.2 cm³ (17.892 cu in)
Stroke 72 mm (2.83 in)
Hole 72 mm (2.83 in)
Idle speed 1,400… 1,500 rpm
124


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