Technical Data; Engine - KTM 125 Duke 2018 Owner's Manual

22 TECHNICAL DATA

22.1
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
214

Engine

1-cylinder 4-stroke engine, water-cooled
125 cm³ (7.63 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 compression 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