KTM 250 SX-F 2006 Repair Manual

5-15
Cylinder head
– Loosen the screws and remove the exhaust flange together with the
gasket.
– Remove the shims from the valve spring retainers (if still mounted).
– Dismount the valve keys using the special tools 590.29.019.000
and 770.29.041.000 and relieve the valve springs.
NOTE: Used valves must be remounted in the same valve guide as
before. We suggest that you place the valves in a carton in the position
they were previously mounted in the cylinder head (see illustration).

KTM 250 SX-F 2006 Specifications

General

Engine Type	Single cylinder, 4-stroke
Displacement	249.5 cc
Compression Ratio	12.8:1
Cooling System	Liquid cooled
Starter	Kickstarter
Transmission	5-speed
Primary Drive	24:73
Final Drive	14:50
Clutch	Wet Multi-Disc Clutch, Hydraulically Operated
Bore x Stroke	76 mm x 54.8 mm
Fuel System	Keihin MX FCR 39 Carburetor
Ignition	Kokusan digital CDI
Lubrication	Pressure lubrication with 2 Eaton pumps