TECHNICAL DATA - ENGINE 85
Design 1-cylinder 4-stroke engine, water-cooled
Displacement 449.3 cm³ (27.418 cu in)
Stroke 60.8 mm (2.394 in)
Bore 97 mm (3.82 in)
Compression ratio 12.5:1
Idle speed 1,550… 1,650 rpm
Control DOHC, four valves controlled via cam lever, drive via helical gear
pair and tooth-wheel chain
Valve diameter, intake 40.4 mm (1.591 in)
Valve diameter, exhaust 31.7 mm (1.248 in)
Valve clearance, cold, intake 0.10… 0.15 mm (0.0039… 0.0059 in)
Valve clearance, cold, exhaust 0.15… 0.20 mm (0.0059… 0.0079 in)
Crankshaft bearing 2 cylinder roller bearing
Conrod bearing Needle bearing
Piston pin bearing No bearing bush - piston pin made of TiAl alloy with DLC coat-
ing
Pistons Forged light alloy
Engine lubrication Pressure circulation lubrication with 3 rotor pumps
Primary transmission 29:74
Clutch Multidisc clutch in oil bath/hydraulically activated
Transmission ratio
1st gear 14:35
2nd gear 17:33
3rd gear 19:30
4th gear 21:28
5th gear 23:26
Alternator 12 V, 200 W
Ignition Contactless controlled fully electronic ignition with digital igni-
tion adjustment
Spark plug NGK CR 9 EKB
Spark plug electrode gap 0.7 mm (0.028 in)
Cooling Water cooling, permanent circulation of coolant by water pump
Starting aid Electric starter
18.1Capacity - engine oil
Engine oil
Oil change 1.20 l (1.27 qt.) Engine oil (SAE 10W/60) (00062010035) ( p. 114)
Engine oil (SAE 10W/50) ( p. 114)
Engine service 1.50 l (1.59 qt.) Engine oil (SAE 10W/60) (00062010035) ( p. 114)
Engine oil (SAE 10W/50) ( p. 114)
18.2Capacity - coolant
Coolant 1.2 l (1.3 qt.) Coolant ( p. 114)
Coolant (mixed ready to use) ( p. 114)
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