Yamaha YZF-R1P Utility Trailer User Manual


 
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ENG
VALVES AND VALVE SPRINGS
2. Measure:
compressed valve spring force a
Out of specification Replace the valve
spring.
b
Installed length
Compressed valve spring force
(installed)
Intake valve spring
82 ~ 96 N
(8.2 ~ 9.6 kg, 18.43 ~ 21.58 lb)
at 34.5 mm (1.36 in)
Exhaust valve spring
110 ~ 126 N
(11.0 ~ 12.6 kg, 24.73 ~ 28.32 lb)
at 35 mm (1.38 in)
3. Measure:
valve spring tilt a
Out of specification Replace the valve
spring.
Spring tilt limit
Intake valve spring
1.7 mm (0.067 in)
Exhaust valve spring
1.8 mm (0.071 in)
EAS00242
CHECKING THE VALVE LIFTERS
The following procedure applies to all of the
valve lifters.
1. Check:
valve lifter
Damage/scratches Replace the valve lift-
ers and cylinder head.
EAS00245
INSTALLING THE VALVES
The following procedure applies to all of the
valves and related components.
1. Deburr:
valve stem end
(with an oil stone)