KTM 250 SX-F 2005, Repair Manual

Page: 80 / 125

– Attach thrust bushings to the cylinder and mount a new cylinder
head gasket.
– Pull the timing chain through the timing chain compartment with
the cable clips and mount the cylinder head, being careful not to
damage the chain tensioning rail.
– Turn in the well-oiled cylinder head screws and washers and tighten
crosswise to 40 Nm in the first stage.
– Tighten crosswise to 50 Nm in the second stage.
– Tighten the 3 screws to 10 Nm.
– Insert the guide rail with the nose
1
resting in the recess
2
in the
securing guide.
– Align the hole in the guide rail with the hole in the cylinder head.
– Apply Loctite 243 to the thread of the bearing bolt
3
, mount the
bearing bolt with a new CU seal ring and tighten to 10 Nm.
6-11
1
1
2
3
3