Installing The Camshaft And Rocker Arms - Yamaha RAPTOR YFM125RA Service Manual

5. Measure:
• Rocker arm shaft outside diameter "a"
Out of specification → Replace.
Rocker arm shaft outside diam-
eter
9.981–9.991
0.3933 in)
Limit
9.950 mm (0.3917 in)
6. Calculate:
• Rocker-arm-to-rocker-arm-shaft clear-
ance
Out of specification → Replace the defec-
tive part(s).
TIP
Calculate the clearance by subtracting the
rocker arm shaft outside diameter from the
rocker arm inside diameter.
Rocker-arm-to-rocker-arm-shaft
clearance
0.009–0.034
0.0013 in)
Limit
0.08 mm (0.0031 in)
EAS24040
INSTALLING THE CAMSHAFT AND
ROCKER ARMS
1. Lubricate:
• Rocker arm shafts
Recommended lubricant
Rocker arm inner surface
Molybdenum disulfide grease
Rocker arm shaft outer surface
Engine oil
mm (0.3930–
mm (0.0004–
5-16
2. Install:
• Exhaust rocker arm "1"
• Exhaust rocker arm shaft "2"
• Intake rocker arm "3"
• Intake rocker arm shaft "4"
Slide hammer bolt
90890-01083
Slide hammer bolt 6 mm
YU-01083-1
ECA2PA1502
Install the rocker arm shafts so that the
threaded side faces outward.
TIP
Use a slide hammer bolt "5" to install the
rocker arm shaft.
3. Lubricate:
• Camshaft
• Camshaft bearings
Recommended lubricant
Camshaft
Molybdenum disulfide grease
Camshaft bearing
Engine oil
CAMSHAFT