CYLINDER COVER
Disassembling
1. Remove the bolts of cylinder head cover.
2. Remove the bolts of the cylinder cover according to the reverse numbering sequence of the
cylinder cover.
3. Remove the crankcase cover. Remove the valve push rod.
4. Remove the rocker arm pivot, rocker arm, rocker arm shaft and push rod plate.
5. Use the valve spring compressor to remove intake door and exhaust door.
Push rod
Inspect valve push rod runout. Replace if exceeding the specified value.
Valve push rod runout limit: 0.5mm
Valve and valve pipe
1. Inspect the valve seat width. If not in the prescribed range, repair the valve seat.
Valve seat width: 0.6～0.8mm
2. Inspect the valve margin thickness (T). If not as in the prescribed value, replace the valve.
The margin thickness of valve:
T
Intake door: 0.7mm
Exhaust door: 1.00mm
3. Inspect the valve stem diameter. If not in the prescribed range, replace the valve.
The diameter of valve stem:
Intake valve: 5.475～5.490mm
Exhaust valve: 5.460～5.475mm
50
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