kymco mo kxr 50 Instruction De Maintenance

Measure compressed force (valve spring)
and installed length.
Replace if out of specification.

Service  limits:

IN : 3.47_ 4.27kg(at 26.0mm)                     
EX : 8.29_ 10.19kg(at 29.0mm)

Check the intake manifold and O-rings for
wear or damage.

O-ring