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8. CYLINDER HEAD/VALVES MXU 500 IRS
Camshaft
Support both ends of the camshaft with V-
blocks and check the camshaft runout with a
dial gauge.
Service limit: 0.05 mm
Inspect camshaft lobes for
pitting/scratches/blue discoloration.
Measure the cam lobe height.
Service Limits: IN : 37.11 mm
EX: 36.86 mm
If any defects are found, replace the camshaft
with a new one, then inspect lubrication
system.
Check the decompression system by turning
the decompressor cam on the exhaust
camshaft.
You should be able to turn the decompressor
cam clockwise smoothly, but the
decompressor should not turn
counterclockwise.
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