Technical Data; Engine; All 250 Models; All 300 Models - KTM 250 EXC TPI 2018 Owner's Manual

22.1

Engine

22.1.1

All 250 models

Design
Displacement
Stroke
Hole
Idle speed
Exhaust valve, beginning of adjustment
Crankshaft bearing
Conrod bearing
Piston pin bearing
Piston
Piston rings
Engine lubrication
X distance (upper edge of piston to upper edge of
cylinder)
Z distance (height of control flap)
Primary transmission
Clutch
Transmission
Transmission ratio
First gear
Second gear
Third gear
Fourth gear
Fifth gear
Sixth gear
Alternator
Ignition system
Spark plug
Spark plug electrode gap
Cooling
Starting aid
22.1.2

All 300 models

Design
Displacement
Stroke
Hole
Idle speed
1-cylinder 2-stroke engine, water-cooled, with reed
intake, exhaust control and transfer duct injection
249 cm³ (15.19 cu in)
72 mm (2.83 in)
66.4 mm (2.614 in)
1,400 ... 1,500 rpm
5,500 rpm
1 grooved ball bearing/1 roller bearing
Needle bearing
Needle bearing
Cast aluminum
2 half keystone rings
Separate lubrication
0 ... 0.10 mm (0 ... 0.0039 in)
49 mm (1.93 in)
26:73
Multidisc clutch in oil bath/hydraulically activated
6-gear, claw shifted
14:32
16:26
20:25
22:23
25:22
26:20
12 V, 196 W
Contactless controlled, fully electronic ignition with
digital ignition adjustment, type Kokusan
NGK ZGR 7 G1
1.3 mm (0.051 in)
Water cooling, permanent circulation of coolant by
water pump
Kick starter and electric starter
1-cylinder 2-stroke engine, water-cooled, with reed
intake, exhaust control and transfer duct injection
293.2 cm³ (17.892 cu in)
72 mm (2.83 in)
72 mm (2.83 in)
1,400 ... 1,500 rpm

22 TECHNICAL DATA

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