TECHNICAL DATA - ENGINE 142
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Design 1-cyliner 4-stroke engine, water-cooled
Displacement (Every 450 models) 449.3cm³ (27.42cuin)
Displacement (Every 530 models) 510.4cm³ (31.15cuin)
Stroke (Every 450 models) 63.4mm (2.5in)
Stroke (Every 530 models) 72mm (2.83in)
Bore 95mm (3.74in)
Compression ratio 11,9:1
Idle speed 1550… 1650rpm
Control 4 valves controlled via rocker arm, drive via tooth/wheel chain
Valve diameter, intake 39.5mm (1.56in)
Valve diameter, exhaust 31.7mm (1.25in)
Valve clearance
Outfeed at: 20°C (68°F) 0.12… 0.17mm (0.0047… 0.01in)
Infeed at: 20°C (68°F) 0.1… 0.15mm (0.0039… 0.01in)
Crankshaft bearing 2 grooved ball bearings
Conrod bearing Needle bearing
Piston pin bearing not a bearing bush - DLC-plated piston pins
Pistons Forged light alloy
Piston rings 1 compression ring, 1 oil scraper ring
Engine lubrication Pressure circulation lubrication with 2 rotor pumps (engine) / 1
rotor pump (transmission)
Primary transmission 33:76
Clutch Multidisc clutch in oil bath / hydraulically activated
Transmission ratio
1st gear 14:36
2nd gear 17:32
3rd gear 19:28
4th gear 22:26
5th gear 24:23
6th gear 26:21
Generator 12V, 150W
Ignition Contactless controlled fully electronic ignition with digital igni-
tion adjustment, type Kokusan
Spark plug NGK LK AR 8A - 9
Spark plug electrode gap 0.8… 0.9mm (0.03… 0.04in)
Cooling Water cooling, permanent circulation of coolant by water pump
Starting aid Electric starter / kickstarter
Capacity- engine oil
Engine oil 0.6l (0.63qt.) Engine oil (SAE 10W/50) ( P. 174)
Capacity - gear oil
Gear oil 0.9l (0.95qt.) Engine oil (SAE 10W/50) ( P. 174)
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