kymco mo kxr 50 Instruction De Maintenance

Inspect each valve for bending, burning,

scratches or abnormal stem wear.

If any defects are found, replace the valve

with a new one.

Check valve movement in the guide.
Measure each valve stem O.D.

Measure each valve guide I.D.
Subtract each valve stem O.D. from the

corresponding guide I.D. to obtain the stem-

to-guide clearance.
Service  limits: IN : 0.06mm replace if over

EX: 0.08mm replace if over

CYLINDER HEAD INPECTION
Check the spark plug hole and valve areas

for cracks.

Check the cylinder head for warpage with a

straight edge and feeler gauge.

Service Limit: 0.05mm repair or replace if

over

VALVE SPRING INSPECTION
Measure the free length of the inner and

outer valve springs.
Service Limit:

Inner: 30.8mm replace if below
Outer: 33.5mm replace if below

If the stem-to-guide clearance exceeds the

service limits, replace the cylinder head

as necessary.