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ENG
INSPECTION AND REPAIR
2.Measure:
● Valve spring installed force
Out of specification → Replace inner and
outer springs as a set.
a Installed length
Valve spring installed force
Inner spring
(IN/EX)
8.4 ~ 10.2 kg (18.5 ~ 22.5 lb)
at 30.5 mm (1.2 in)
Outer spring
(IN/EX)
16.6 ~ 20.4 kg (36.6 ~ 45.0 lb)
at 32.0 mm (1.26 in)
VALVE INSTALLATION
1.Lubricate:
● Valve stem 1
● Oil seal 2
Molybdenum disulfide oil:
2.Install:
● Intake valves
● Exhaust valves
NOTE:
Be sure to reinstall in its original place.
3.Install:
● Valve spring seat 1 (lower)
● Oil seal 2
● Valve 3
● Valve spring 4 (inner)
● Valve spring 5 (outer)
● Valve spring seat 6 (upper)
● Valve cotters 7
Use the Valve Spring Compressor.
Valve spring compressor:
P/N. YM-04019, 90890-04019
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