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TECHNICAL DATA - ENGINE 152
15TECHNICALDATA-ENGINE
Design 1-cyliner 4-stroke engine, water-cooled
Displacement 654cm³ (39.91cuin)
Stroke 80mm (3.15in)
Bore 102mm (4.02in)
Compression ratio 11,8:1
Control OHC, 4 valves controlled via rocker arm, chain drive
Valve diameter, intake 40mm (1.57in)
Valve diameter, exhaust 34mm (1.34in)
Valve play, cold 0.07… 0.13mm (0.0028… 0.0051in)
Crankshaft bearing 2 roller bearings
Conrod bearing Needle bearing
Piston pin bearing Bronze bush
Pistons Forged light alloy
Piston rings 1 L-ring, 1 tapered compression piston ring, 1 oil scraper ring
Engine lubrication Pressure circulation lubrication with 2 rotor pumps
Primary transmission 36:79
Clutch APTC antihopping clutch in oil-bath / hydraulically actuated
Gearbox 6-gears, claw-shifted
Transmission ratio
1st gear 14:35
2nd gear 16:28
3rd gear 21:28
4th gear 21:23
5th gear 23:22