Hisun HS800UTV - Page 157

ENGINE
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NOTE:
For best lapping results, lightly tap the valve
seat while rotating the valve back and forth
between your hands.
d. Apply a fine lapping compound to the valve
face and repeat the above steps.
NOTE:
A
fter every lapping operation be sure to
clean off all of the compound from the valve
face and valve seat.
e. Install the valve into the cylinder head.
g. Press the valve through the valve guide and
onto the valve seat to make a clear pattern.
h. Measure the valve seat width again. If the
valve seat width is out of specification, reface
and relapse the valve seat.
3、INSTALL:
1). Apply:
• molybdenum disulfide oil
(onto the valve stem and valve stem seal)
2). Install:
• valve spring seats
• valve stem seals
• valves
• valve springs
• valve spring retainers
NOTE:
Install the valve springs with the larger pitch
(a) facing upwards.
(b) Smaller pitch
• valve cotters
NOTE:
Install the valve cotters while compressing
the valve spring with the valve spring
compressor ① and valve spring compressor
attachment ②.