23 TECHNICAL DATA
230
23.1 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
Intake valve diameter 36 mm (1.42 in)
Exhaust valve diameter 29 mm (1.14 in)
Valve clearance, intake, cold 0.10 … 0.15 mm (0.0039 … 0.0059 in)
Valve clearance, exhaust valve, cold 0.15 … 0.20 mm (0.0059 … 0.0079 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 2 trochoidal
pumps
Primary transmission 30:80
Clutch Slipper clutch in oil bath/mechanically operated
Transmission 6-gear transmission, claw shifted
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