Installing The Camshaft And Rocker Arms - Yamaha 2009 YFM25RY Service Manual

Out of specification → Replace the defec-
tive part(s).
Rocker-arm-to-rocker-arm-shaft
clearance
0.009–0.037 mm (0.0004–
0.0015 in)
EAS24040
INSTALLING THE CAMSHAFT AND
ROCKER ARMS
1. Lubricate:
• Camshaft
Recommended lubricant
Camshaft
Molybdenum disulfide oil
Camshaft bearing
Engine oil
2. Lubricate:
• Rocker arm
• Rocker arm shafts
Recommended lubricant
Rocker arm
Molybdenum disulfide oil
Rocker arm shaft
Engine oil
3. Install:
• Exhaust rocker arm "1"
• Exhaust rocker arm shaft "2"
TIP
Make sure the exhaust rocker arm shaft is
completely pushed into the cylinder head.
4. Install:
• Intake rocker arm
• Intake rocker arm shaft
TIP
• Insert a cylinder head bolt (226 mm) "1" into
the hole in the cylinder head and the intake
rocker arm shaft as shown.
• Install the intake rocker arm shaft so that
groove "a" is horizontal and aligning the
notch of the pointed end "b" with the hole in
the cylinder head.
5. Install:
• Camshaft "1"
TIP
Screw a 10 mm bolt into the threaded end of
the camshaft and then install the camshaft.
6. Install:
• Lock plate
7. Tighten:
• Lock plate bolts
Lock plate bolt
8 Nm (0.8 m·kg, 5.9 ft·lb) LOC-
TITE®
5-9
CAMSHAFT