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KINROAD 150 SERVICE MANUAL
VALVE AND VALVE SPRING
VALVE AND VALVE SPRING REMOVAL
Remove the cylinder head.
First remove the valve cotter with the valve compressor, and then
remove in turn the upper spring race, valve spring, lower spring race,
and valve stem oil seal. Remove the valve from the other side.
The removed parts should be placed properly in order. It's
better to place the intake valve parts and exhaust valve parts
separately.
VALVE AND VALVE SPRING INSPECTION
Inspect to see if the valve is bent or burned.
Inspect if the action is smooth between the valve and the valve
guide.
Measure the outer diameter of the valve stem.
Service limit
Measure the free length of the inner and outer valve spring.
Valve
Inlet valve
Inner spring
31.2mm
Outer spring
34.1 mm
VALVE AND VALVE SPRING INSPECTION
Mount the spring retainer, valve guide oil seal
It is recommended to replace the valve guide oil seal with a new one.
After applying oil on the valve stem mount it into the valve guide
Mount the inner and outer valve springs,
Mount the valve locker with a spring compressor.
When mounting, the twisting direction of the inner and outer springs must be opposite, and
cannot be the same.
Tap at the valve gently two or three times with a rubber hammer to make the valve and the valve lock match
well.
Do not damage the valve.
4.9 mm
Exhaust valve
31.2mm
34.1 mm
25
VERSION 1, DEC., 2005
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