Yamaha SR125 1997, Service Manual

Page: 91 / 243

4-11
CAM SHAFT AND ROCKER ARMS
ENG
NOTE:
NOTE:
SR******
ROCKER ARM AND ROCKER ARM SHAFT
REMOVAL
1. Remove:
Camshaft 1
Collar (camshaft) 2
Use 10 mm bolt 3 to remove the camshaft.
2. Remove:
Rocker arm shaft (intake)
Rocker arm shaft (exhaust)
Attach a rocker arm shaft puller bolt 1 and
weight
2
to the rocker arm shaft and slide out
the shaft.
Rocker arm shaft puller bolt:
90890-01083
Weight:
90890-01084
YP402052
CAMSHAFT INSPECTION
1. Inspect:
Cam lobes
Pitting/ Scratches / Blue discoloration
Replace.
2. Measure:
Cam lobes length A and B .
Out of specification Replace.
Cam lobes length:
Intake:
A
36.537 36.637 mm
<Limit: 36.45 mm>
B
30.13 30.231 mm
<Limit: 30.05 mm>
Exhaust:
A 36.577 36.677 mm
<Limit: 36.49 mm>
B
30.214 30.314 mm
<Limit: 30.13 mm>
3. Inspect:
Camshaft oil passage
Stuffed
Blow out oil passage with com-
pressed the air.