Valve And Valve Spring Removal; Valve And Valve Spring Inspection - Yamaha EF2000iS Manuel D'atelier

5
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
4 Remove the parts using the valve
spring compressor 5.
TIP
Do not compress the spring more than neces-
sary.
Valve spring compressor:

VALVE AND VALVE SPRING INSPECTION

1. Measure:
9 Valve stem length a
9 Valve face diameter b
Valve stem length:
Valve face diameter:
SCF3180
Out of specifications → Replace.
2. Measure:
9 Valve stem diameter a
Valve stem diameter:
Standard
Wear limit
Out of specifications → Replace.
3-25
ENG
VALVE
YM-01253, 90890-01253
Intake: 53.0 mm (2.09 in)
Exhaust: 53.2 mm (2.09 in)
Intake: 20.0 mm (0.79 in)
Exhaust: 18.0 mm (0.71 in)
Intake: 4.948 – 4.960 mm
(0.1948 – 0.1953 in)
Exhaust: 4.928 – 4.940 mm
(0.1940 – 0.1945 in)
Intake: 4.908 mm (0.19 in)
Exhaust: 4.908 mm (0.19 in)