Technical Data; Engine; Engine Tightening Torques; Loctite - KTM 250 EXC-F Owner's Manual

23

TECHNICAL DATA

23.1

Engine

Design
Displacement
Stroke
Bore
Compression ratio
Idle speed
Control
Valve diameter, intake
Valve diameter, exhaust
Valve clearance
Intake at: 20 °C (68 °F)
Exhaust at: 20 °C (68 °F)
Crankshaft bearing
Conrod bearing
Piston pin bearing
Pistons
Piston rings
Engine lubrication
Primary transmission
Clutch
Transmission ratio
1st gear
2nd gear
3rd gear
4th gear
5th gear
6th gear
Alternator
Ignition
Spark plug
Spark plug electrode gap
Cooling
Starting aid
23.2

Engine tightening torques

Nozzle, crank chamber ventilation
Oil nozzle for alternator cooling
Oil nozzle for balancer shaft lubrication M4
Oil nozzle for conrod bearing lubrica-
tion
Screw, oil nozzle for piston cooling
Locking screw for bearing
Oil channel screw plug in alternator
cover
Oil nozzle for cam lever lubrication
Oil nozzle for clutch lubrication
Oil nozzle, piston cooling
Screw, clutch spring
Screw, crankshaft position sensor
1-cylinder 4-stroke engine, water-cooled
249.91 cm³ (15.2505 cu in)
52.3 mm (2.059 in)
78 mm (3.07 in)
12.8:1
2,050... 2,150 rpm
DOHC, four valves controlled via cam lever, drive via timing
chain
32.5 mm (1.28 in)
26.5 mm (1.043 in)
0.10... 0.15 mm (0.0039... 0.0059 in)
0.13... 0.18 mm (0.0051... 0.0071 in)
2 cylinder bearings
Slide bearing
Bearing bush
Forged light alloy
1 compression ring, 1 oil scraper ring
Pressure circulation lubrication with two Eaton pumps
24:73
Multidisc clutch in oil bath/hydraulically activated
13:32
16:30
16:24
23:28
23:23
26:20
12 V, 168 W
Contactless controlled fully electronic ignition with digital igni-
tion adjustment
NGK LMAR9AI-10
1.0 mm (0.039 in)
Water cooling, permanent circulation of coolant by water pump
Electric starter and kick starter
M4
M4
M4
M4
M5
M5
M5
M5
M5
M5
M5
2 Nm (1.5 lbf ft)
2 Nm (1.5 lbf ft)
2 Nm (1.5 lbf ft)
2 Nm (1.5 lbf ft)
2 Nm (1.5 lbf ft)
6 Nm (4.4 lbf ft)
1.2 Nm (0.89 lbf ft)
3 Nm (2.2 lbf ft)
6 Nm (4.4 lbf ft)
2 Nm (1.5 lbf ft)
6 Nm (4.4 lbf ft)
6 Nm (4.4 lbf ft)
113

Loctite

® 243™
Loctite ® 243™
Loctite ® 243™
Loctite ® 243™
Loctite 243™
®
Loctite ® 243™
Loctite ® 648™
Loctite ® 243™
Loctite ® 243™
Loctite ® 243™
–
Loctite ® 243™