ZHEJIANG KAYO MOTOR CO., LTD.
Leaking or damaged oil baffle
Too large piston ring clearance
Leakage on cylinder head gasket combination
3
Excessive noise or abnormal
noise
Too big valve clearance
The valve is stuck or the valve spring is broken
Excessive wear of the rocker arm
Inaccurate valve timing
Camshaft wear
Removal of the left cover of the cylinder head
Small view
hole cover
Cylinder head left cover Large view hole cover
1. Remove the bolts of the left cover of the cylinder head.
2. Remove the left cover of the engine cylinder head and the left cover gasket.
Remove the tightened size view hole cover.
TIMING CHECK
Driven sprocket timing mark
Cylinder head timing mark
Magneto rotor positive time line
1. Engine left front cover timing markUsing a special tool to rotate the C100 six-stage magneto lock nut, and
observe whether the timing line on the magneto rotor is aligned with the timing mark on the left front cover
through the small view hole on the left front cover.
Observing from the left cover of the engine cylinder head whether the timing mark of the driven
sprocket is aligned with the timing mark of the cylinder head.
Removal of the valve cover
Valve cover
1. Remove the valve covers on the intake and exhaust sides of the cylinder head.
After the valve cover is disassembled, check whether the thread is damaged and the sealing ring is damaged. If
damaged, use new parts when reassembling.
Check the valve clearance
1. Check whether the timing scale of the magnet rotor is aligned with the timing mark on the left front cover, and
the timing sprocket O is aligned with the timing mark on the cylinder head.
2. The valve should have slight clearance in the axial direction and no clearance between the upper and lower
sides.
The valve clearance should be in the range of 0.01-0.03mm.
Removal of the cylinder head
Cap nut Cylinder head cover
Cylinder head and cylinder block connecting boltThe disassemble steps of the cylinder head are as follows:
1
．
Remove the 4 pieces cap nuts of GB/T 923/M6 which uses to fasten the cylinder head cover.
2
．
Remove 3 Φ6.2×Φ13×2 iron washers and 1 Φ6.5×Φ13×2 copper washer.
3
．
Remove the cylinder head cover and cylinder head cover gasket.
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