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23.1
engine
Design
Displacement
Stroke
Bore
Compression ratio
Control
Valve diameter, intake
Valve diameter, exhaust
Valve play, cold
Intake at: 20 °C (68 °F)
Exhaust at: 20 °C (68 °F)
Crankshaft bearing
Conrod bearing
Pistons
Piston rings
Engine lubrication
Primary transmission
Clutch
Transmission
Transmission ratio
First gear
Second gear
Third gear
Fourth gear
Fifth gear
Sixth gear
Mixture preparation
Ignition
Alternator
Spark plug
Spark plug electrode gap
Cooling
Idle speed
Starting aid
TECHNICAL SPECIFICATIONS 23
2-cylinder 4-stroke in-line engine, water-cooled
799 cm³ (48.76 cu in)
65.7 mm (2.587 in)
88 mm (3.46 in)
12.5:1
DOHC, 4 valves per cylinder controlled via cam lever,
chain drive
36 mm (1.42 in)
29 mm (1.14 in)
0.10 ... 0.15 mm (0.0039 ... 0.0059 in)
0.15 ... 0.20 mm (0.0059 ... 0.0079 in)
Slide bearing
Slide bearing
Forged light alloy
1 compression ring, 1 lower compression ring, 1 oil
ring with spring expander
Pressure circulation lubrication with 2 trochoidal
pumps
39:75
Slipper clutch in oil bath/mechanically operated
6-gear transmission, claw shifted
13:37
17:34
20:31
22:28
24:26
23:22
Electronic fuel injection
Contactless controlled fully electronic ignition with
digital ignition adjustment
12 V, 400 W
NGK LMAR9AI‑10
1.0 ... 1.1 mm (0.039 ... 0.043 in)
Water cooling, permanent circulation of coolant by
water pump
1,400 rpm
Starter motor
151
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