Removal
| Note do not expand the piston ring excessively since it is apt to be broken down. |

Installation
Note
|
After placing the spacer, fit the two side rails (2).

| Caution when installing the spacer, be careful not to allow its two ends to overlap in the groove. |

|
| Note 1st ring (4) and 2nd ring (3) differ in shape. |

| Note face the side with the stamped mark upward when assembling. |


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Cylinder inspection
Piston and piston ring inspectionCylinder head cover related parts
inspection
Refer to “engine top side disassembly” .
Refer to “engine top side assembly” .
Refer to “cylinder head cover disassembly and assembly” .
Cylinder head cover
Clean and check the gasket grooves “a” and pair reed
valve mating surfaces “b” of the cylinder head cover.
If there is anything unu ...
Valve seat repair
The valve seats (1) for both the intake and exhaust
valves are machined to three different angles. The seat
contact surface is cut at 45°.
Intake valve
Exhaust valve
Caution
the valve seat contact area must be
inspected after e ...
Clutch parts inspection
Refer to “clutch removal” and “clutch installation” .
Clutch drive and driven plate
Note
wipe off the engine oil from the drive and
driven plates with a clean rag.
Measure the thickness of drive plates with a vernier
calipers. If the drive plate thickness is found to have ...