KYMCO XCITING 500 Service Manual page 157

8. CYLINDER HEAD/VALVES
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
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 with the small-pitch
portion (1) facing cylinder head. (2) Large-
pitch portion.
Put on the valve sparing 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
8-15
Valve Spring Compressor
E040
XCITING 500
(2)
(1)