KYMCO UXV 500i Service Manual page 167

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8. CYLINDER HEAD/VALVES

Measure compressed force (valve spring) and

installed length.

Replace if out of specification.

Inner: 3.5 kg (at 28.7 mm, 1.148 in)

Outer: 13 kg (at 31.43 mm, 1.2572 in)

Measure the spring tilt.

Replace if out of specification.

Inner: 1.2 mm (0.048)

Outer: 1.2 mm (0.048)

Install the valve spring seats and oil seal.

Be sure to install new oil seal.

Lubricate each valve with engine oil and

insert the valves into the valve guides.

Install the valve springs and retainers.

Compress the valve springs using the valve

spring compressor, then install the valve

• When assembling, a valve spring

compressor must be used.

• Install the cotters with the pointed ends

facing down from the upper side of the

cylinder head.

Special tool:

Valve Spring Compressor

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