CHAPTER 3B ENGINE 50cc/80cc ATV SERVICE MANUAL09.0
CHAPTER 3B ENGINE PAGE 3B - 11 -
Disassembly cylinder head
Take off location pin and cylinder head
gasket.
Take off camshaft chain guide bar.
Breaking down cylinder head
Use valve spring compressor to take off lock
clip 、supporter、valve spring and valve.
· Place parts in a sequence after
disassembling and assemble at a reverse
process .
Clean carbon deposit from combustion
chamber.
Get rid of gasket material on cylinder head
surface
Don’t damage cylinder head sealing surface.
Checking
Cylinder head
Check spark plug hole for damage.
Check valve spring seats for alignment.
Used limit: 0.05mm above align
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