
22 TECHNICAL DATA
220
22.1
Engine
Design
1-cylinder 4-stroke engine, water-cooled
Displacement
373 cm³ (22.76 cu in)
Stroke
60 mm (2.36 in)
Bore
89 mm (3.5 in)
Compression ratio
12.6:1
Control
DOHC, 4 valves controlled via cam lever, chain drive
Valve diameter, intake
36 mm (1.42 in)
Valve diameter, exhaust
29 mm (1.14 in)
Valve clearance, intake, cold
0.10 … 0.15 mm (0.0039 … 0.0059 in)
Valve clearance, exhaust, cold
0.15 … 0.20 mm (0.0059 … 0.0079 in)
Crankshaft bearing
2 slide bearings
Conrod bearing
Sleeve bearing
Pistons
Forged light alloy
Piston rings
1 compression ring, 1 tapered compression piston
ring, 1 oil scraper ring
Engine lubrication
Pressure circulation lubrication with two rotary pumps
Primary transmission
30:80
Clutch
Slipper clutch in oil bath/mechanically operated
Transmission
6-gear transmission, claw shifted
Transmission ratio
Summary of Contents for 390 Duke AR 2019
Page 1: ...OWNER S MANUAL 2019 390 Duke Art no 3213939en ...
Page 2: ......
Page 22: ...4 VIEW OF VEHICLE 20 4 1 View of vehicle front left example V01275 10 ...
Page 24: ...4 VIEW OF VEHICLE 22 4 2 View of vehicle rear right example V01276 10 ...
Page 47: ...COMBINATION INSTRUMENT 7 45 ...
Page 48: ...7 COMBINATION INSTRUMENT 46 7 5 Indicator lamps F00900 01 ...
Page 51: ...COMBINATION INSTRUMENT 7 49 ...
Page 52: ...7 COMBINATION INSTRUMENT 50 7 6 Display M01580 11 ...