Installing The Valve And Valve Spring - Yamaha 5KM2-AE1 Service Manual

VALVES AND VALVE SPRINGS
11.Measure:
Compressed spring force a
G
Out of specification → Replace.
b Installed length
12.Measure:
Spring tilt a
G
Out of specification → Replace.
INSTALLING THE VALVE AND VALVE
SPRING
1.Apply:
Molybdenum disulfide oil
G
(onto the valve stem and valve stem seal)
2.Install:
Valve spring seats
G
Valve stem seals
G
Valves
G
Valve springs
G
Valve spring retainers
G
NOTE:
Install the valve springs with the larger pitch a
facing upwards.
b Smaller pitch
4 - 30
ENG
Compressed spring force:
Intake:
100.0 ~ 115.7 N at 27.5 mm
(10.20 ~ 11.80 kg,
22.48 ~ 26.01 lb at 1.08 in)
Exhaust:
120.6 ~ 138.3 N at 31.0 mm
(12.30 ~ 14.10 kg,
27.11 ~ 31.09 lb at 1.22 in)
Spring tilt limit:
Intake:
2.5°/1.4 mm (0.06 in)
Exhaust:
2.5°/1.6 mm (0.06 in)
New