CHAPTER 3A ENGINE 260/ 300 / 400 cc ATV SERVICE MANUAL09.0
CHAPTER 3 ENGINE PAGE. 3A- 27
Inspection steps:
zInspect the two contact areas on the rocker
arms for signs of unusual wear.
zRocker arm shaft hole.
zCam-lobe contact surface.
Excessive wear → Replace.
zInspect the surface condition of the rocker arm
shafts.
Pitting/scratches/blue discoloration → Replace
or check lubrication.
zMeasure the inside diameter A of the rocker
arm holes.
Out of specification → Replace.
Inside diameter (rocker arm ):
12.000- 12.018mm
< Lim it: 12.030 mm >
z Measure the outside diameter B of the rocker
arm shafts.
Out of specification → Replace.
Outside diameter(rocker arm shaft):
11.981-11.991 mm
<Limit: 11.95 mm>
CAMSHAFT AND ROCKER ARM
INSTALLATION
1. Lubricate:
zCam shaft c
Camshaft:
Molybdenum disulfide oil
Camshaft bearing:
Engine oil
2. Install:
zPlatec
zLockwasher d NEW
zBolt e
NOTE:
Bend the lockwasher tabs along the bolt e falts.
3. Apply:
zMolybdenum disulfide oil onto the rocker arm
and rocker arm shaft.
Molybdenum disulfide oil
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