24 TECHNICAL DATA
24.1
Engine
Design
1-cylinder 4-stroke engine, water-cooled
Displacement
349.7 cm
3
(21.34 cu in)
Stroke
57.5 mm (2.264 in)
Bore
88 mm (3.46 in)
Compression ratio
14.0:1
Idle speed
2,250 ... 2,350 rpm
Control
DOHC, four valves controlled via cam lever, drive via
timing chain
Valve diameter, intake
36.3 mm (1.429 in)
Valve diameter, exhaust
29.1 mm(1.146 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)
0.13 ... 0.18 mm (0.0051 ... 0.0071 in)
Crankshaft bearing
2 cylinder bearings
Conrod bearing
Plain bearing
Piston pin bearing
Bearing bush
Pistons
Forged light alloy
Piston rings
1 compression ring, 1 oil scraper ring
Engine lubrication
Pressure circulation lubrication with two Eaton
pumps
Primary transmission
24:73
Clutch
Multidisc clutch in oil bath/hydraulically activated
Gearbox
5-gear, claw shifted
Transmission ratio
1st gear
14:28
2nd gear
16:26
3rd gear
18:24
4th gear
21:24
5th gear
22:21
Alternator
12V,77W
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
258