Cylinder Head
A
Caution
I
Incorrect fitment of the valve stem oil seals could
I
lead to high oil consumption and blue smoke
emissions from the exhaust system. Do not use
I
excessive force in fitting the seal as this may break
I
I
the seal ring.
4.
Install the valve spring over the valve stem.
5.
Compress the valve spring ensuring that the
spring is compressed squarely to prevent
damage to the valve stem and cylinder head.
6.
Fit the valve collets ensuring correct collet
location in the spring cap and valve as the spring
~
-
compressor is released.
A
Caution
I
1
Always check for correct location of the valve collets
during and after assembly. If not fitted correctly, the
collets may become dislodged when the engine is
running allowing the valves to contact the pistons.
Any such valve to piston contact will cause severe
engine damage.
Valve to Valve Guide Clearance
If the valve guides are worn beyond the service limit
given below, the cylinder head must be replaced.
Valve Stem to Guide Clearance
Valve Guides
Inlet:
Exhaust:
If a valve guide is found to be worn beyond the service
limit, the complete cylinder head must be renewed.
0.01 0
-
0.040
mm
0.030
-
0.060
mm
Valve Face Inspection
1.
Remove any carbon build-up from the valve head
area. Examine the valve seat face, checking in
particular for signs of cracking or pitting.
Sewice Manual
-
Speed Triple
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