Yamaha T135SE Service Manual page 126

CAMSHAFT
2. Check:
9 rocker arm shaft
Blue discoloration/excessive wear/pitting/
scratches → Replace or check the lubrica-
tion system.
3. Measure:
9 rocker arm inside diameter
Out of specification → Replace.
Rocker arm inside diameter
9.985 – 10.000 mm
(0.3931 – 0.3937 in)
<Limit>: 9.950 mm (0.3917 in)
4. Measure:
9 rocker arm shaft outside diameter
Out of specification → Replace.
Rocker arm shaft outside diameter
9.966 – 9.976 mm
(0.3924 – 0.3928 in)
<Limit>: 9.950 mm (0.3917 in)
5. Calculate:
9 rocker-arm-to-rocker-arm-shaft clearance
NOTE:
Calculate the clearance by subtracting the rock-
er arm shaft outside diameter from the rocker
arm inside diameter.
Above 0.08 mm → Replace the rocker arm and
rocker arm shaft as a set.
Rocker-arm-to-rocker-arm-shaft
clearance
0.009 – 0.034 mm
(0.0004 – 0.0013 in)
<Limit>: 0.080 mm (0.0031 in)
4-20
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