22 TECHNICAL DATA
217
22.1 Engine
Design 1-cylinder 4-stroke engine, water-cooled
Displacement 373 cm³ (22.76 cu in)
Stroke 60 mm (2.36 in)
Bore 89 mm (3.5 in)
Compression ratio 12.6:1
Control DOHC, 4 valves controlled via cam lever, chain drive
Valve diameter, intake 36 mm (1.42 in)
Valve diameter, exhaust 29 mm (1.14 in)
Valve clearance, intake, cold 0.08 … 0.12 mm (0.0031 … 0.0047 in)
Valve clearance, exhaust, cold 0.13 … 0.17 mm (0.0051 … 0.0067 in)
Crankshaft bearing 2 slide bearings
Conrod bearing Sleeve bearing
Pistons Forged light alloy
Piston rings 1 compression ring, 1 tapered compression piston
ring, 1 oil scraper ring
Engine lubrication Pressure circulation lubrication with two rotary pumps
Primary transmission 30:80
Clutch Slipper clutch in oil bath/mechanically operated
Transmission 6-gear, claw shifted
Transmission ratio
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