Installing The Valves And Valve Springs - Yamaha Raptor 90 YFM90RA 2011 Service Manual

CAMSHAFT, ROCKER ARMS AND VALVES
11.Measure:
• spring tilt
Out of specification → Replace.
Spring tilt limit
Inner
2.0°/1.2 mm(2.0°/0.05 in)
EBS00241
INSTALLING THE VALVES AND VALVE
SPRINGS
1. Apply:
• molybdenum disulfide oil
(onto the valve stem and valve stem seal)
2. Install:
• valve spring seats
• valve stem seals
• valves
• valve springs
• valve spring retainers
TIP
Install the valve springs with the larger pitch
facing upwards.
Smaller pitch
3. Install:
• valve cotters
TIP
Install the valve cotters while compressing the
valve spring with the valve spring compressor
and attachment
Valve spring compressor
P/N. YM-04019, 90890-04019
Valve spring compressor attach-
ment
P/N. YM-04108, 90890-04108
4. To secure the valve cotters onto the valve
stem, lightly tap the valve tip with a piece of
wood.
NOTICE
Hitting the valve tip with excessive force
could damage the valve.
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ENG
New
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