Technical Data - Engine - KTM 125 Duke Owner's Manual

TECHNICAL DATA - ENGINE

Design
Displacement
Stroke
Bore
Compression ratio
Control
Valve diameter, intake
Valve diameter, exhaust
Valve clearance, intake, cold
Valve clearance, exhaust, cold
Crankshaft bearing
Conrod bearing
Pistons
Piston rings
Engine lubrication
Primary transmission
Clutch
Transmission
Transmission ratio
1st gear
2nd gear
3rd gear
4th gear
5th gear
6th gear
1-cylinder 4-stroke engine, water-cooled
124.7 cm³ (7.61 cu in)
47.2 mm (1.858 in)
58 mm (2.28 in)
12.8:1
DOHC, 4 valves controlled via cam lever, chain drive
22.5 mm (0.886 in)
19 mm (0.75 in)
0.08... 0.12 mm (0.0031... 0.0047 in)
0.13... 0.17 mm (0.0051... 0.0067 in)
Two ball bearings
Sleeve bearing
Cast light alloy
1 L-ring, 1 tapered compression piston ring, 1 oil scraper ring
Pressure circulation lubrication with one rotary pump
22:72
Clutch in oil bath/mechanically activated
6-gear, claw shifted
12:34
15:31
18:28
21:26
22:23
24:22
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