Yamaha YZF-R6RC Automobile User Manual


 
5-29
VALVES AND VALVE SPRINGS
ENG
3. Measure:
Svalve spring tilt
a
Out of specification ! Replace the valve
spring.
Spring tilt limit
Intake valve spring (inner)
2.5_/1.6 mm (0.06 in)
(outer)
2.5_/1.8 mm (0.07 in)
Exhaust valve spring
2.5_/1.8 mm (0.07 in)
EAS00242
CHECKING THE VALVE LIFTERS
The following procedure applies to all of the
valve lifters.
1. Check:
Svalve lifter
Damage/scratches ! Replace the valve lift-
ers and cylinder head.
EAS00246
INSTALLING THE VALVES
The following procedure applies to all of the
valves and related components.
1. Deburr:
Svalve stem end
(with an oil stone)
2. Lubricate:
Svalve stem
1
Svalve stem seal
2
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide oil
3. Install:
Svalve
1
Slower spring seat
2
Svalve stem seal
3
Svalve spring inner (intake only)
4
Svalve spring outer
5
Supper spring seat
6
(into the cylinder head)