CAUTION:
Do not overlap the valve. Turn the lapping tool evenly with a downward force of 40~50N. Do
not contaminate push rod and valve guide bush with lapping compound.
Valve installation
1. Install new valve oil seal and spread engine oil to the valve guide bush.
2. Install valve, valve spring seal, valve spring and valve spring retainer in sequence.
3. Compress the valve spring with valve spring compressor and install valve cotter.
4. Knock valve spring retainer slightly with plastic or rubber hammer to fix the valve cotter.
Assembling cylinder cover
1. Install new oil seal with special tool.
2. Install camshaft into cylinder cover from the direction of oil pump.
3. Check whether spline position is facing the conjunction surface of cylinder. Adjust if necessary.
4. Install rocker arm assembly, spring and rocker shaft.
5. Assemble oil pump.
NOTE:
Ensure mark on the external rotor is facing the oil pump cover.
6. Align oil pump drive shaft with camshaft pin, then install oil pump.
CAUTION:
Before installing oil pump, make sure the oil passage is through, and fill the oil pump with oil.
CRANKCASE
Disassembling
1. Remove the oil cleaner with special tool.
NOTE:
Put one piece of cloth under oil cleaner
Oil cleaner spanner
61
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