Yamaha EF1000 - Valve Service and Inspection

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CYLINDER HEAD COVER, CYLINDER HEAD, VALVE
ENG 8
Intake Valve face:
Exhaust Valve face:
@
3-7
CYLINDER HEAD INSPECTION
1. Remove:
•Carbon deposits
Use rounded scraper.
2. Measure:
•Cylinder head warpage
Exceeds allowable limit ---?Resurface.
I~
Warpage Limit:
0.1 mm (0.004 in)
VALVE REMOVAL
1. Remove:
•Valve spring retainer CD
•Vale spring ~
•Valve ®
VALVE INSPECTION
1. Inspect:
•Valve length@
•Valve face diameter@
Valve length:
Intake: 53.4 mm (2.10 in)
Exhaust: 53.6 mm (2.11 in)
Valve face diameter:
Intake: 19.0 mm (0.75 in)
Exhaust: 17.0 mm (0.67 in)