KYMCO Mongoose/KXR 250 Service Manual page 92

7
. CYLINDER HEAD/VALVES
Mongoose/KXR 250
Camshaft Holder
CAMSHAFT HOLDER INSPECTION
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
Measure each rocker arm shaft O.D.
Measure the I.D. of each valve rocker arm.
Measure arm to shaft clearance.
Replace as a set if out of specification.
Service limits: 0.10mm
7-6