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8. CYLINDER HEAD/VALVES UXV 500
Measure compressed force (valve spring) and
installed length.
Replace if out of specification.
Standard:
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.
Standard:
Inner: 1.2 mm (0.048)
Outer: 1.2 mm (0.048)
ASSEMBLY Valve Spring Compressor
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
cotters.
· 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 A120E00040
8-26