Checking The Rocker Arms And Rocker Arm Shafts - Yamaha XF50W Service Manual

THE ROCKER ARMS AND CAMSHAFT
EAS00206
CHECKING THE ROCKER ARMS AND
ROCKER ARM SHAFTS
The following procedure applies to all of the
rocker arms and rocker arm shafts.
1. Check:
• rocker arm (camshaft touch surface©)
• rocker arm (valve touch surface®)
Damage/wear
2. Check:
• rocker arm shaft
Blue discoloration/excessive wear/pitting/
scratches
cation system.
3. Check:
•camshaft lobe
Excessive wear
4. Measure:
• rocker arm inside diameter a
Out of specification
Rocker arm inside diameter
10 ~ 10.015 mm (0.3937 ~ 0.3943
in)
<Limit>:10.030mm (0.3949 in)
5-16
-» Replace.
-» Replace or check the lubri-
-» Replace the camshaft.
-» Replace.