23 TECHNICAL DATA
160
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 13.5:1
Idle speed 1,400 … 1,600 rpm
Control DOHC, 4 valves per cylinder, chain-driven
Valve - valve plate diameter
Intake 42 mm (1.65 in)
Exhaust 34 mm (1.34 in)
Valve clearance
Intake at: 20 °C (68 °F) 0.10 … 0.15 mm (0.0039 … 0.0059 in)
Exhaust at: 20 °C (68 °F) 0.25 … 0.30 mm (0.0098 … 0.0118 in)
Crankshaft bearing Sleeve bearing
Conrod bearing Sleeve bearing
Piston Forged light alloy
Piston ring 1 upper compression (rectangular) ring, 1 lower com-
pression ring, 1 oil scraper ring
Engine lubrication Dry sump lubrication system with 3 trochoidal pumps
Primary transmission 40:76
Clutch Antihopping clutch in oil bath/hydraulically operated
Transmission 6-gear transmission, claw shifted
Transmission ratio
1st gear 12:35
2nd gear 15:32
3rd gear 18:30
4th gear 20:27
5th gear 24:27
6th gear 27:26
Mixture preparation Electronic fuel injection
Ignition system Contactless controlled fully electronic ignition with
digital ignition adjustment
Alternator 12 V, 450 W
Spark plug
Inside spark plug NGK LKAR9BI‑10
Outside spark plug NGK LMAR7DI‑10
Electrode gap, spark plug 1 mm (0.04 in)
Cooling Water cooling, permanent circulation of coolant by
water pump
Cold start device Starter motor
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