KTM 250 SX-F 2007 User Manual

5-10
Repair manual KTM 250 -F Art.-No. 3.206.052-E
Camshaft bearing
– Clamp the camshaft in a vise with protective aluminum jaws.
Position one of the cams so that the camshaft cannot be turned.
– Loosen the camshaft gear (A/F 21) and remove the screw.
– Pull off the camshaft gear using the extractor 590.29.033.000 and
pressure tool 770.29.035.000.
– Knock out the positioning pin
1.
NOTE: There is a hole
B in the camshaft across from the positioning
pin. The positioning pin can be knocked out through this hole with a
suitable driver.
– Pull off the camshaft bearing using the extractor 590.29.033.000
and pressure tool 770.29.035.000.
– Slide on a new camshaft bearing; if necessary, knock on the inner
ring with a suitable pipe.
NOTE: the positioning ring
2 for the camshaft bearing must face up,
as shown in the photo. If the camshaft bearing is mounted upside
down, the camshaft will not fit in the cylinder head.
– Knock in the positioning pin.
– Slide on the camshaft gear, apply Loctite 243 to the screw and
tighten to 80 Nm.
NOTE: use the same procedure for both camshafts.
1
2
B

KTM 250 SX-F 2007 Specifications

General

Engine Type	Single cylinder, 4-stroke
Displacement	249.5 cc
Compression Ratio	12.8:1
Ignition	Kokusan digital CDI
Starter	Kickstarter
Transmission	5-speed
Lubrication	Pressure lubrication with 2 Eaton pumps
Primary Drive	24:73
Final Drive	13:50
Clutch	Wet multi-disc clutch, hydraulically operated
Bore x Stroke	76 mm x 54.8 mm
Fuel System	Keihin MX FCR 39 carburetor