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TECHNICAL DATA - ENGINE
Design
Displacement
Stroke
Bore
Compression ratio
Idle speed
Coolant temperature: ≥ 70 °C (≥ 158 °F)
Control
Valve diameter, intake
Valve diameter, exhaust
Valve play, cold
Crankshaft bearing
Conrod bearing
Piston pin bearing
Pistons
Piston rings
Engine lubrication
Primary transmission
Clutch
Gearbox
Transmission ratio
1st gear
2nd gear
3rd gear
4th gear
1-cylinder 4-stroke engine, water-cooled
654 cm³ (39.91 cu in)
80 mm (3.15 in)
102 mm (4.02 in)
11.8:1
1,550... 1,650 rpm
OHC, 4 valves controlled via rocker arm, chain drive
40 mm (1.57 in)
34 mm (1.34 in)
0.07... 0.13 mm (0.0028... 0.0051 in)
2 roller bearings
Needle bearing
Bronze bush
Forged light alloy
1 L-ring, 1 tapered compression piston ring, 1 oil scraper ring
Semi-dry sump lubrication with two rotor pumps
36:79
APTC™ Antihopping clutch in oil bath / hydraulically operated
6-gears, claw-shifted
14:35
16:28
21:28
21:23
144
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