Checking The Rocker Arms And Rocker Arm Shafts - Yamaha XN125 2000 Service Manual

CAMSHAFT
3. Measure:
• camshaft lobe dimensions a and b .
Out of specification → Replace the camshaft.
Camshaft lobe dimension limit
Intake
a 30.711mm
b 25.045 mm
Exhaust
a 30.711 mm
b 25.052 mm
4. Check:
• camshaft oil passage
Obstruction → Blow out with compressed air.
EAS00206
CHECKING THE ROCKER ARMS AND
ROCKER ARM SHAFTS
The following procedure applies to all of the roc-
ker 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 lubrication
system.
3. Check:
• camshaft lobe
Excessive wear → Replace the camshaft.
4. Measure:
• rocker arm inside diameter
Out of specification → Replace.
Rocker arm inside diameter
12.000 ~ 12.018 mm
<Limit>:12.030mm
5. Measure:
• rocker arm shaft outside diameter
Out of specification → Replace.
Rocker arm shaft outside diameter
11.981 ~ 11.991 mm
<Limit>:11.950 mm
4-6
ENG