Rocker Arms Removal/Inspection/Installation - KYMCO 2006 MXU 500 Off-Road Owner's Manual

8. CYLINDER HEAD/VALVES
ROCKER ARMS
REMOVAL/INSPECTION/
INSTALLATION
REMOVAL
Remove the camshafts (refer to the
"CAMSHAFT REMOVAL/INSPECTION/
INSTALLATION" section in this chapter).
Remove the rocker arm shafts and washers,
then remove the rocker arms.
INSPECTION
Rocker arm shaft
Inspect the rocker arm shaft for blue
discoloration or grooves.
If any defects are found, replace the rocker
arm shaft with a new one, then inspect
lubrication system.
Measure each rocker arm shaft O.D.
Measure the I.D. of each rocker arm.
Measure arm to shaft clearance.
Replace as a set if out of specification.
Service limits: 0.1 mm (0.004 in)
Inspect the rocker arm bore, cam lobe contact
surface and adjuster surface for
wear/pitting/scratches/blue discoloration.
If any defects are found, replace the rocker
arm shaft with a new one, then inspect
lubrication system.
Measure each rocker arm shaft O.D.
Measure the I.D. of each rocker arm.
Measure arm to shaft clearance.
Replace as a set if out of specification.
Service limits: 0.1 mm (0.004 in)
8-15
Rocker Arms
Rocker Arm Shafts/Washers
Rocker Arm Shaft
MXU 500
Rock Arm