22 TECHNICAL DATA
185
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
Idle speed
Coolant temperature:
≥
70 °C (
≥
158 °F)
1,600… 1,700 rpm
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