Yamaha FZ09E Service Manual page 244

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2. Measure:
• Compressed valve spring force "a"
Out of specification
4
Replace the valve
spring.
t
b. Installed length
Installed compression spring
force (intake)
192.00-220.00 N (19.58-22.43
kgf, 43.16-49.46 lbf)
Installed compression spring
force (exhaust)
162.00-186.00 N (16.52-18.97
kgf, 36.42-41.81 lbf)
Installed length (intake)
32.90 mm (1.30 in)
Installed length (exhaust)
32.00 mm (1.26 in)
3. Measure:
• Valve spring tilt "a"
Out of specification
4
Replace the valve
spring.
Spring tilt (intake)
1. 7 mm (0.07 in)
Spring tilt (exhaust)
1.6 mm (0.06 in)
VALVES AND VALVE SPRINGS
---a
...... ,,.
CHECKING THE VALVE LIFTERS
The following procedure applies to all of the
valve lifters.
1. Check:
• Valve lifter
Damage/scratches
4
Replace the valve lift-
ers and cylinder head.
....,.,..
INSTALLING THE VALVES
The following procedure applies to all of the
valves and related components.
1. Deburr:
• Valve stem end
(with an oil stone)
2.
Lubricate:
• Valve stem "1"
• Valve stem seal "2"
(with the recommended lubricant)
Recommended lubricant
1-~l
Molybdenum disulfide oil
5-27