ENGINE 3-21
CAMSHAFT ASSEMBLY
INSPECTION
Check the camshaft for abnormal wear or damage.
Measure the cam height H with a micrometer.
If the cam height H is less than the service limit, replace the
camshaft assembly with a new one.
Cam height H (IN & EX):
Service Limit: 28.13 mm (1.1075 in)
09900-20202: Micrometer (25 – 50 mm)
• Install the camshaft assembly as shown in the photograph, if
disassemble it.
NOTE:
* Align the shaft punch mark with the cam punch mark.
* Assemble the springs 1 diagonally.
1: Spring
UPPER CRANKCASE/CYLINDER
BUSHING
Inspect the bushing 1 for wear or damage.
If any defects are found, replace it with a new one.
CYLINDER DISTORTION
Check the gasket surface of the cylinder for distortion with a
straightedge and thickness gauge, taking a clearance reading at
several places as indicated.
If the largest reading at any position of the straightedge exceeds
the service limit, replace the upper crankcase/cylinder.
Cylinder distortion:
Service Limit: 0.05 mm (0.002 in)
09900-20803: Thickness gauge
Do not attempt to disassemble the camshaft assem-
bly.
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