47
ATV1013A
2. The lobe heights must be greater than minimum
specifications.
Inspecting Camshaft Bearing
Journal
1. Inspect the bearing journal for scoring, seizure
marks, or pitting.
2. If excessive scoring, seizure marks, or pitting is
found, the cylinder head assembly must be replaced.
Measuring Camshaft to Cylinder
Head Clearance
1. Loosen the jam nuts and adjuster screws.
CC005D
2. Place a strip of plasti-gauge in each of the camshaft
lands in the cylinder head.
3. Place the cylinder head cover on the cylinder head
and secure with the cap screws. Tighten securely.
NOTE: Do not rotate the camshaft when measuring
clearance.
4. Remove the cap screws securing the cylinder head
cover to the cylinder; then remove the cylinder head
cover and camshaft.
MD1261
5. Match the width of the plasti-gauge with the chart
found on the plasti-gauge packaging to determine
camshaft to cylinder head and cylinder head cover
clearance.
CC145D
6. If clearance is excessive, measure the journals of the
camshaft.
CC287D
NOTE: If the journals are worn, replace the cam-
shaft; then measure the clearance again. If it is still
out of tolerance, replace the cylinder head.
Inspecting Camshaft
Spring/Unloader Pin
1. Inspect the spring and unloader pin for damage.
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