22 TECHNICAL DATA
149
22.1
Engine
22.1.1
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
Engine lubrication
Mixture oil lubrication
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 ignition 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
22.1.2
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
