Checking The Rocker Arms And Rocker Arm Shafts - Yamaha BT1100 2002 Service Manual

ROCKER ARMS AND CAMSHAFTS
EB401410
CHECKING THE ROCKER ARMS AND ROCK-
ER ARM SHAFTS
The following procedure applies to all of the rock-
er arms and rocker arm shafts.
1. Check:
• rocker arm
Damage/wear
• rocker arm lobe 1
• valve adjuster 2
Excessive wear
2. Check:
• rocker arm shaft
Blue discoloration/excessive wear/pitting/
scratches
tion system.
3. Measure:
• rocker arm inside diameter a
Out of specification
Rocker arm inside diameter
4. Measure:
• rocker arm shaft outside diameter b
Out of specification
Rocker arm shaft outside diameter
5. Calculate:
• rocker-arm-to-rocker-arm-shaft clearance
NOTE:
Calculate the clearance by subtracting the rocker
arm shaft outside diameter from the rocker arm
inside diameter.
Above 0.086 mm
part(-s).
Rocker-arm-to-rocker-arm-shaft
clearance
4-18
ENG
Replace.
Replace.
Replace or check the lubrica-
Replace.
14.036 mm
Replace.
13.95 mm
Replace the defective
0.009 0.033 mm
<Limit> : 0.086 mm