Yamaha TT-R125(R), Owner'S Service Manual

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ENG
CAMSHAFT AND ROCKER ARMS
REMOVAL POINTS
Rocker arm shaft
1. Remove:
●
Rocker arm shafts
NOTE:
Use a slide hammer bolt 1 and weight 2 to
slide out the rocker arm shafts.
Small slide hammer set:
YU-1083-A
Slide hammer bolt:
90890-01085
Weight:
90890-01084
Camshaft
1. Remove:
●
Camshaft 1
●
Camshaft bearing
2
NOTE:
Screw in a suitable length of 8 mm bolt 3 into
the threaded end of the camshaft and pull out
the camshaft.
INSPECTION
Camshaft
1. Inspect:
●
Cam lobes
Pitting/scratches/blue discoloration
→
Replace.
2. Measure:
●
Cam lobes length
a
and
b
Out of specification
→
Replace.
Cam lobes length limit:
Intake:
a
25.851 mm (1.0178 in)
b
21.165 mm (0.8333 in)
Exhaust:
a
25.811 mm (1.0162 in)
b
21.020 mm (0.8276 in)