Installing The Camshaft And Rocker Arms - Yamaha YZF-R15 Service Manual

2. Check:
• Rocker arm shaft
Blue discoloration/excessive wear/pit-
ting/scratches → Replace or check the lubri-
cation system.
3. Measure:
• Rocker arm inside diameter "a"
Out of specification → Replace.
Rocker arm inside diameter
9.985–10.000 mm
Limit
10.030 mm
4. Measure:
• Rocker arm shaft outside diameter "a"
Out of specification → Replace.
Rocker arm shaft outside diame-
ter
9.966–9.976 mm
Limit
9.950 mm
5. Calculate:
• Rocker-arm-to-rocker-arm-shaft clearance
NOTE:
Calculate the clearance by subtracting the rock-
er arm shaft outside diameter from the rocker
arm inside diameter.
Out of specification → Replace the defective
part(s).
Rocker-arm-to-rocker-arm-shaft
clearance
0.009–0.034 mm
Limit
0.08 mm
INSTALLING THE CAMSHAFT AND ROCKER
ARMS
1. Lubricate:
• Rocker arms
• Rocker arm shafts
Recommended lubricant
Rocker arm inner surface
Molybdenum disulfide oil
Rocker arm shaft
Engine oil
2. Lubricate:
• Camshaft
Recommended lubricant
Camshaft
Molybdenum disulfide oil
Camshaft bearing
Engine oil
3. Install:
• Intake and exhaust rocker arms
• Rocker arm shafts "1"
NOTE:
• Make sure that the cutout "a" in each rocker
arm shaft is facing downward as shown in the
illustration.
• Make sure the rocker arm shafts (intake and
exhaust) are completely pushed into the cylin-
der head.
a
1
5-15
CAMSHAFT
1