22 TECHNICAL DATA 174
22.1 engine
Design 1-cylinder 4-stroke engine, water-cooled
Displacement 692.7 cm³ (42.271 cu in)
Stroke 80 mm (3.15 in)
Bore 105 mm (4.13 in)
Compression ratio 12.7:1
Control OHC, intake with cam levers, exhaust controlled by rocker arm,
chain drive
Valve diameter, intake 42 mm (1.65 in)
Valve diameter, exhaust 34 mm (1.34 in)
Valve play, cold
Intake at: 20 °C (68 °F) 0.10… 0.15 mm (0.0039… 0.0059 in)
Exhaust at: 20 °C (68 °F) 0.20… 0.25 mm (0.0079… 0.0098 in)
Crankshaft bearing 2 roller bearings
Conrod bearing Slide bearing
Piston pin bearing Piston pin with DLC coating
Pistons Forged light alloy
Piston rings 1 compression ring, 1 lower compression ring, 1 oil ring with
spring expander
Engine lubrication Semi-dry sump lubrication system with two rotor pumps
Primary transmission 36:79
Clutch APTC™ antihopping clutch in oil bath/hydraulically operated
Transmission 6-gear, claw shifted
Transmission ratio
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