KYMCO X-Town 250 ABS Service Manual page 77

6. CYLINDER HEAD/VALVES
REMOVAL
Remove the camshaft .
Remove the rocker arm shafts and then
remove the rocker arms.
INSPECTION
Camshaft holder
Inspect the bearing surface of camshaft holder
for scoring, scratches, or evidence of
insufficient lubrication.
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)
6-7
X-Town250/300 ABS
Valve Rocker Arms
Rocker Arm Shafts
Camshaft Holder
Rocker Arm Shafts