Checking The Camshaft Bearing Bridges; Removing The Valves - KTM 450 SX-F EU Repair Manual

301ENGINE - WORK ON THE INDIVIDUAL PARTS
145
Cbeckinl the camshaft bearinl bridles
30122l>-lO
Ramovinlllla walVIS
- Remove camshaft bearing bridge again. Compare the Plastigaua;e clearance
gauge with the specifications on the packaging.
Guideline
Camshaft bearing - radial clearance
Radial clearance
0.044 ... 0.068 mm (0.00173 ...
0.00268
in)
Wear limit
0.075 mm (0.00295 in)
• Info
I
The width of the Plastia;aua;1 clearance gauge is a measure of the bearing
play.
- Remove camshaft bearing bridge
- Take off the camshafts and clean the parts.
- Check the camshaft bearing bridges for damage.
»
If there is damage or wear:
- Change the cylinder head with the camshaft bearing bridge.
- Fold up the cam levers.
- Take shims out of the valve spring retainers and set them aside in the arrange-
ment corresponding to their installation positions.
- Remove the screw plugs of the cam lever shaft with the O-ring.
- Turn screw into the cam lever shaft.
- Hold cam levers and remove the cam lever shafts.
• Info
I
If the cam levers will continue to be used, note down their installation posi-
tion.
- Pre-tension the valve springs using the special tool.
Valve spring compressor
(59029019000) ( ..
p.
229)
Insert for valve spring lever (77329060000) ( .. p. 234)
- Remove the valve keys and unload the valve springs.