23 TECHNICAL DATA
230
23.1
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
Intake valve diameter
36 mm (1.42 in)
Exhaust valve diameter
29 mm (1.14 in)
Valve clearance, intake, cold
0.10 … 0.15 mm (0.0039 … 0.0059 in)
Valve clearance, exhaust valve, 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 2 trochoidal
pumps
Primary transmission
30:80
Clutch
Slipper clutch in oil bath/mechanically operated
Transmission
6-gear transmission, claw shifted
Summary of Contents for RC 390 2020
Page 1: ...OWNER S MANUAL 2020 RC 390 Art no 3214117en...
Page 2: ......
Page 15: ...SAFETY ADVICE 2 13...
Page 16: ...2 SAFETY ADVICE 14 2 5 Overview of labels A00273 10...
Page 18: ...2 SAFETY ADVICE 16 A00630 10 Information on noise emissions S03391 01 Type label for USA...
Page 30: ...4 VIEW OF VEHICLE 28 4 1 View of vehicle front left example A00270 10...
Page 32: ...4 VIEW OF VEHICLE 30 4 2 View of vehicle rear right example A00271 01...
