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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
Piston pin bearing
Pistons
Piston rings
Engine lubrication
2-cylinder 4-stroke in-line engine, water-cooled
890 cm³ (54.31 cu in)
68.8 mm (2.709 in)
90.7 mm (3.571 in)
13.5:1
DOHC, 4 valves per cylinder controlled via cam lever,
chain drive
37 mm (1.46 in)
30 mm (1.18 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
Piston pin with bronze coating
Forged light alloy
1 compression ring, 1 lower compression ring, 1 oil
ring with spring expander
Semi-dry sump lubrication system with two trochoid
pumps
TECHNICAL DATA 23
323
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