
21
TECHNICAL DATA
157
21.1
Engine
Design
1-cylinder 4-stroke engine, water-cooled
Displacement
375 cm³ (22.88 cu in)
Stroke
60 mm (2.36 in)
Bore
89 mm (3.5 in)
Compression ratio
12.8:1
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
0.08… 0.12 mm (0.0031… 0.0047 in)
Valve clearance, exhaust, cold
0.13… 0.17 mm (0.0051… 0.0067 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
Clutch in oil bath/mechanically activated
Transmission
6-gear, claw shifted
Transmission ratio
1st gear
12:32
2nd gear
14:26
3rd gear
19:27
Summary of Contents for 390 Duke 2015 COL
Page 1: ...OWNER S MANUAL 2015 390 Duke 2015 COL Art no 3213123en ...
Page 2: ......
Page 17: ...15 ...
Page 18: ...4 VIEW OF VEHICLE 16 4 1 View of vehicle front left example 101923 10 ...
Page 20: ...4 VIEW OF VEHICLE 18 4 2 View of vehicle rear right example 101924 10 ...
Page 133: ...14 ELECTRICAL SYSTEM 131 Finishing work Check the headlight setting p 128 ...