Valve And Valve Spring Removal; Valve And Valve Spring Inspection - Yamaha EF3000iSE Service Manual

VALVE AND VALVE SPRING REMOVAL

1. Remove:
• Valve cotter 1
• Valve spring retainer 2
• Valve spring 3
• Valve 4
Remove the parts using the valve
spring compressor 5.
CAUTION:
SVU3160J
Do not compress the valve spring more
than necessary.
Valve spring compressor:

VALVE AND VALVE SPRING INSPECTION

1. Measure:
• Valve stem length a
• Valve face diameter b
Valve stem length:
Valve face diameter:
SVU3170J
Out of specification → Replace.
2. Measure:
• Valve stem diameter a
Valve stem diameter:
Wear limit:
Out of specification → Replace.
SVU3180J
3-29
ENG
VALVE
YM-01253, 90890-01253
Intake: 65.9 mm (2.59 in)
Exhaust: 66.2 mm (2.61 in)
Intake: 23.9 ~ 24.1 mm
(0.9409 ~ 0.9488 in)
Exhaust: 21.9 ~ 22.1 mm
(0.8622 ~ 0.8701 in)
Intake: 5.448 ~ 5.463 mm
(0.2145 ~ 0.2151 in)
Exhaust: 5.440 ~ 5.445 mm
(0.2142 ~ 0.2144 in)
Intake: 5.418 mm (0.2133 in)
Exhaust: 5.410 mm (0.2130 in)