Yamaha Rhino 450 YXR45FAV, Service Manual

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ENG
CAMSHAFT, ROCKER ARMS AND VALVES
12.Measure:
• spring tilt
a
Out of specification
→
Replace.
Spring tilt limit
Inner
2.5°/1.7 mm (2.5°/0.067 in)
Outer
2.5°/1.9 mm (2.5°/0.075 in)
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 (inner and outer)
• valve spring retainers
NOTE:
Install the valve springs with the larger pitch
a
facing upwards.
b
Smaller pitch
New
3. Install:
• valve cotters
NOTE:
Install the valve cotters while compressing the
valve spring with the valve spring compressor
1
.
4. To secure the valve cotters onto the valve
stem, lightly tap the valve tip with a soft-face
hammer.
CAUTION:
Hitting the valve tip with excessive force
could damage the valve.
Valve spring compressor
P/N. YM-04019, 90890-04019