Valve And Valve Spring Removal; Valve And Valve Spring Inspection - Yamaha EF2400iS Service Manual

5
4
a

VALVE AND VALVE SPRING REMOVAL

1
1. Remove:
2
9 Valve cotter 1
9 Valve spring retainer 2
3
9 Valve spring 3
9 Valve 4
NOTE:
Do not compress the spring more than neces-
sary.

VALVE AND VALVE SPRING INSPECTION

1. Measure:
9 Valve stem length a
9 Valve face diameter b
SCF3180
2. Measure:
9 Valve stem diameter a
3-26
VALVE
Remove the parts using the valve
spring compressor 5.
Valve spring compressor:
YM-01253, 90890-01253
Valve stem length:
Intake: 65.9 mm (2.59 in)
Exhaust: 66.2 mm (2.61 in)
Valve face diameter:
Intake: 24.0 mm (0.94 in)
Exhaust: 22.0 mm (0.87 in)
Out of specifications → Replace.
Valve stem diameter:
Intake and exhaust: 5.5mm
(0.22 in)
Wear limit
Intake: 5.4 mm (0.21 in)
Exhaust: 5.4 mm (0.21 in)
Out of specifications → Replace.
ENG