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7. CYLINDER HEAD/VALVES ATV 150/125
Camshaft Bearings
Check each camshaft bearing for play or
damage. Replace the camshaft assembly
with a new one if the bearings are noisy or
have excessive play.
CAMSHAFT HOLDER DISASSEMBLY Rocker Arm Bolt
Remove the bolt attaching the stop plate.
Take out the valve rocker arm shafts using a
5mm bolt.
Remove the valve rocker arms.
Rocker Arm Shaft
Camshaft Holder
CAMSHAFT HOLDER INSPECTION
Inspect the camshaft holder, valve rocker
arms and rocker arm shafts for wear or
damage.
If the valve rocker arm contact surface is
worn, check each cam lobe for wear or
damage.
Rocker Arm Shafts
Measure the I.D. of each valve rocker arm.
Measure each rocker arm shaft O.D.
Measure arm to shaft clearance.
Replace as a set if out of specification.
Service limits: 0.1 mm (0.004 in)
7-6