Checking The Valve Springs; Checking The Valves - Yamaha F100C Service Manual

NOTE:
Do not mix the valve train parts. Keep them
organized in their proper groups.
7. Remove the intake valve and exhaust
valves.
NOTE:
• Be sure to keep the valves, springs, and
other parts in the order as they were
removed.
• When replacing the valve, also replace the
valve guide and stem seal.
Valve spring compressor 8:
90890-04019
Valve spring compressor attachment
9:
90890-06320
60C5D11

Checking the valve springs

1. Measure the valve spring free length a.
Replace if out of specification.
S60C5380
Valve spring free length limit a:
2. Measure the valve spring tilt b. Replace
if out of specification.
Valve spring tilt limit b:

Checking the valves

1. Check the valve face for pitting or wear.
Replace if necessary.
2. Measure the valve margin thickness a.
Replace if out of specification.
Cylinder head
52.25 mm (2.057 in)
2.6 mm (0.1 in)
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