Camshaft And Rocker Arm Installation - Yamaha YP250 Service Manual

CAMSHAFT AND ROCKER ARMS
YP402060
ROCKER
SHAFTS INSPECTION
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Inspection steps:
D Inspect the two contact areas on the rocker
D Rocker arm shaft hole.
D Cam-lobe contact surface.
D Inspect the surface condition of the rocker
D Measure the inside diameter a of the rocker
D Measure the outside diameter b of the rocker
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YP******
CAMSHAFT AND ROCKER ARM
INSTALLATION
4-13
ARMS AND
1. Inspect:
S Cam lobe contact surface 1
S Adjuster surface 2
Wear/Pitting/Scratches/Blue
ation ! Replace.
arms for signs of unusual wear.
Excessive wear ! Replace.
arm shafts.
Pitting/scratches/blue discoloration ! Re-
place or check lubrication.
arm holes.
Out of specification ! Replace.
Inside diameter (rocker arm):
12.000 X 12.018 mm
<Limit: 12.030 mm>
arm shafts.
Out of specification ! Replace.
Outside diameter
(rocker arm shaft):
11.981 X 11.991 mm
<Limit: 11.995 mm>
1. Lubricate:
S Camshaft 1
Camshaft:
Molybdenum disulfide oil
Camshaft bearing:
Engine oil
ENG
ROCKER ARM
discolor-