7. CYLINDER HEAD/VALVES ATV 150/125
CYLINDER HEAD ASSEMBLY
Install the valve spring seats and valve stem
seals.
Be sure to install new valve stem seals.
Lubricate each valve stem with engine oil
and insert the valves into the valve guides.
Install the valve springs and retainers.
Valve Spring Compressor
Compress the valve springs using the valve
spring compressor, then install the valve
cotters.
· When assembling, a valve spring
compressor must be used.
· Install the cotters with the pointed ends
facing down from the upper side of the
cylinder head.
Special tool:
Valve Spring Compressor E040
Tap the valve stems gently with a plastic
hammer for 23 times to firmly seat the
cotters.
Be careful not to damage the valves.
Dowel Pins Gasket
CYLINDER HEAD
INSTALLATION
Install the dowel pins and a new cylinder
head gasket.
Install the cam chain guide.
Cam Chain Guide
7-10
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