KTM 250 SX-F 2005 Repair Manual page 117

TECHNICAL DATA – ENGINE 250 SX-F 2005/06/07, SXS-F 2006/07
Design
Displacement
Bore/Stroke
Ratio
Fuel
Valve timing
Camshaft
Valve diameter Intake
Valve diameter Exhaust
Valve clearence cold Intake
Valve clearence cold Exhaust
Crank shaft bearing
Connecting rod bearing
Top end bearing
Piston
Piston rings
Engine lubrication
Engine oil
Quantity of engine oil
Primary drive
Transmission claw shifted
1st gear
2nd gear
3rd gear
4th gear
5th gear
6th gear
Ignition system
Generator
Spark plug
Cooling system
Cooling liquid
BASIC CARBURATOR SETTING
Type
Main jet
Jet needle
Idling jet
Main air jet
Idling air jet
Needle position
Starting jet
Mixture control screw open
Slide
Performance restrictor
Stop pump membrane
Leak jet
Hot start device
Liquid-cooled single cylinder 4-stroke engine
249.51 ccm
76 / 55 mm
12.8 : 1
unleaded fuel with at least RON 95
4 valves controlled by finger levers and 2 camshafts,
driven by a pair of spur gears and a tooth-type chain
05
30.9 mm
26.5 mm
0.10 - 0.20 mm
0.12 - 0.22 mm
2 cylinder roller bearings
needle bearing
bronze bushing
alluminium alloy forged
1 compression ring, 1 oil scraper ring
pressure circulation lubrication with 2 rotor pumps
full synthetic oil (Motorex Power Synt 4T 10W/50)
1.1 liters
22:68
6-speed
13:32
15:30
17:28
19:26
21:25
22:24
contactless DC-CDI ignition with digital advanced system by KOKUSAN
no generator
NGK CR 9 EBK
liquid cooled, permanent rotation of cooling liquid through mechanically driven water pump
1.2 liters, 50% antifreeze, 50% destilled water, at least -25° (-13° F)
250 SX-F 2005/06 250 SXS-F 2006
Keihin FCR-MX 39
168 180
OBETP
40
200
100
5 th from top
85
1,25
15
–
858 / 2,15 mm
-
2,5 mm
250 SX-F 2007 250 SXS-F 2007
175 180
50
10-2