TECHNICAL DATA 23
233
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
Valve diameter, intake
36 mm (1.42 in)
Valve diameter, exhaust
29 mm (1.14 in)
Valve clearance, intake, cold
0.10 … 0.15 mm (0.0039 … 0.0059 in)
Valve clearance, exhaust, 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 two rotary pumps
Primary transmission
30:80
Clutch
Slipper clutch in oil bath/mechanically operated
Transmission
6-gear, claw shifted
Transmission ratio
