Yamaha 2012 Grizzly 300 Service Manual page 132

ROCKER ARMS AND CAMSHAFT
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2
2
a
EAS00206
CHECKING THE ROCKER ARMS AND
ROCKER ARM SHAFTS
The following procedure applies to all of the
rocker arms and rocker arm shafts.
1. Check:
rocker arm
•
•
Valve clearance adjusting screws
Damage/wear
2. Check:
rocker arm shaft
•
Blue discoloration/excessive wear/pitting/
scratches
cation system.
3. Measure:
rocker arm inside diameter a
•
Out of specification
Rocker arm inside diameter
11.982~12.000 mm (0.4717~
0.4724 in)
<Limit>: 12.080mm (0.4756 in)
4. Measure:
rocker arm shaft outside diameter a
•
Out of specification
Rocker arm shaft outside diameter
11.996~11.984 mm (0.4723~
a
0.4718 in)
<Limit>: 11.936 mm (0.4699 in)
5. Calculate:
rocker-arm-to-rocker-arm-shaft clearance
•
NOTE:
Calculate the clearance by subtracting the rocker
arm shaft outside diameter from the rocker arm
inside diameter.
Above 0.034 mm(0.001 in)
fective part(s).
Rocker-arm-to-rocker-arm-shaft
clearance
0.016 mm (0.0006 in)
<Limit>: 0.144 mm (0.0057 in)
4-12
ENG
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Replace.
Replace or check the lubri-
Replace.
Replace.
Replace the de-