Checking The Rocker Arms And Rocker Arm Shafts - Yamaha XT660R S Service Manual

ROCKER ARMS AND CAMSHAFT
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EAS00206
CHECKING THE ROCKER ARMS AND
ROCKER ARM SHAFTS
The following procedure applies to both of the
rocker arms and rocker arm shafts.
1. Check:
• rocker arm
Damage/wear → Replace.
2. Check:
• rocker arm shaft
Blue discoloration/excessive wear/pitting/
scratches → Replace or check the lubrica-
tion system.
3. Measure:
• rocker arm inside diameter
Out of specification → Replace.
Rocker arm inside diameter
12.000 ~ 12.018 mm
(0.4724 ~ 0.4731 in)
<Limit>: 12.036 mm (0.4739 in)
4. Measure:
• rocker arm shaft outside diameter
Out of specification → Replace.
Rocker arm shaft outside diame-
ter
11.981 ~ 11.991 mm
(0.4717 ~ 0.4721 in)
<Limit>: 11.955 mm (0.4707 in)
ENG