23 TECHNICAL DATA 170
23.1 Engine
Design 2-cylinder 4-stroke Otto engine, 75° V arrangement, water-cooled
Displacement 1,301 cm³ (79.39 cu in)
Stroke 71 mm (2.8 in)
Bore 108 mm (4.25 in)
Compression ratio 13.2:1
Idle speed 1,300… 1,500 rpm
Control DOHC, 4 valves per cylinder, chain-driven
Valve - valve stem diameter
Intake 42 mm (1.65 in)
Exhaust 34 mm (1.34 in)
Valve clearance
Exhaust at: 20 °C (68 °F) 0.25… 0.30 mm (0.0098… 0.0118 in)
Intake at: 20 °C (68 °F) 0.10… 0.15 mm (0.0039… 0.0059 in)
Crankshaft bearing Sleeve bearing
Conrod bearing Sleeve bearing
Piston Forged light alloy
Piston ring 1 upper compression (rectangular) ring, 1 lower compression ring,
1 oil scraper ring
Engine lubrication Dry sump lubrication system with three rotor pumps
Primary transmission 40:76
Clutch Antihopping clutch in oil bath/hydraulically operated
Transmission 6-speed claw gears
Transmission ratio
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