Rocker Arms And Rocker Arm Shafts - Yamaha TT-R125(W) Owner's Service Manual

CAMSHAFT AND ROCKER ARMS
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Rocker arms and rocker arm shafts

1. Inspect:
Cam lobe contact surface a
G
Adjuster surface 1
G
Wear/pitting/scratches/blue
tion → Replace.
Measurement steps:
Measure the inside diameter a of the
G
rocker arm holes.
Out of specification → Replace.
Inside diameter (rocker arm):
10.000 ~ 10.015 mm
(0.3937 ~ 0.3943 in)
<Limit>: 10.03 mm (0.3949 in)
Measure the outside diameter b of the
G
rocker arm shafts.
Out of specification → Replace.
Outside diameter
(rocker arm shaft):
9.981 ~ 9.991 mm
(0.3930 ~ 0.3933 in)
<Limit>: 9.95 mm (0.3917 in)
ASSEMBLY AND INSTALLATION
1. Apply:
Molybdenum disulfide oil
G
(onto the camshaft cam lobe and rocker
arm hole)
Engine oil
G
(onto the camshaft bearing)
2. Install:
Rocker arms
G
Camshaft 1
G
3. Apply:
Engine oil
G
(onto the rocker arm shaft)
4. Install:
Rocker arm shaft
G
ENG
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