Technical Data; Engine - KTM 125 DUKE 2022 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
1st gear
2nd gear
3rd gear
4th gear
5th gear
6th gear
Mixture preparation
Ignition
Alternator
Spark plug
Spark plug electrode gap
Cooling
Idle speed
Starting aid
104

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, four valves controlled via cam lever, chain
drive
22.5 mm (0.886 in)
19 mm (0.75 in)
0.10 ... 0.15 mm (0.0039 ... 0.0059 in)
0.15 ... 0.20 mm (0.0059 ... 0.0079 in)
Two ball bearings
Sleeve bearing
Cast light alloy
One compression ring, one tapered compression pis-
ton ring, one oil scraper ring
Pressure circulation lubrication with one trochoidal
pump
22:72
Clutch in oil bath/mechanically activated
6-gear transmission, claw shifted
12:34
15:31
18:28
21:26
22:23
24:22
Electronic fuel injection
Contactless controlled fully electronic ignition with
digital ignition adjustment
12 V, 230 W
BOSCHVR5NEU
1 mm (0.04 in)
Water cooling, permanent circulation of coolant by
water pump
1,500 ± 50 rpm
Starter motor