25 TECHNICAL DATA
25.1
Engine
Design
1-cylinder 4-stroke engine, water-cooled
Displacement
449.9 cm
3
(27.455 cu in)
Stroke
63.4 mm (2.496 in)
Bore
95 mm (3.74 in)
Compression ratio
12.75:1
Idle speed
2,250 ... 2,350 rpm
Control
OHC, 4 valves controlled via rocker arm
Valve diameter, intake
40 mm (1 .57 in)
Valve diameter, exhaust
33 mm (1 .3 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)
0.12 ... 0.17 mm (0.004 7 ... 0.0067 in)
Crankshaft bearing
2 cylinder roller bearing
Conrod bearing
Slide 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 two Eaton
pumps
Primary transmission
31 :76
Clutch
Multidisc clutch in oil bath, hydraulically activated
Gearbox
5-gear, claw shifted
Transmission ratio
First gear
16:32
Second gear
18:30
Third gear
20:28
Fourth gear
22:26
Fifth gear
24:24
Alternator
12V, 70W
Ignition
Contactless controlled fully electronic ignition with
digital ignition adjustment
Spark plug
NGK LMAR9Al-8
Spark plug electrode gap
0.8 mm (0.031 in)
Cooling
Water cooling, permanent circulation of coolant by
water pump
Starting aid
Electric starter
265
Содержание F2303P0
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Страница 157: ...16 BRAKE SYSTEM Check the foot brake lever for a firm pressure point 155 ...
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