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7. CYLINDER HEAD/VALVES MXU 250R/300R
Rocker Arms Stop Plate
CAMSHAFT HOLDER DISASSEMBLY
Take out the valve rocker arm shafts.
Remove the valve rocker arms, arm shafts
and stop plate.
Rocker Arm Shafts
CAMSHAFT HOLDER INSPECTION Camshaft Holder
Inspect the camshaft holder for wear or
damage.
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.
Rocker Arm Shafts
Rocker Arm Bore
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.
Contact Surface Adjuster Surface
7-6