Rocker Arm And Camshaft Installation - Yamaha XVS650 Service Manual

ROCKER ARMS AND CAMSHAFT
ENG
~
~.
4.1nspect:
• Rocker arms
• Rocker arm shafts
Damage/wear
-7
Replace.
**********************************
Inspection steps:
.Inspect the two contact areas on the
rocker arms for signs of abnormal wear.
1) Rocker arm shaft hole.
2) Camshaft lobe contact surface.
Excessive wear
-7
Replace.
• Inspect the surface of the rocker arm shafts.
Blue discoloration/pitting/scratches
-?
Replace/check lubrication.
• Measure the inside diameter
®
of the
rocker arm holes.
Out of specification
-?
Replace.
Rocker arm inside diameter:
14.000
N
14.018 mm
(0.5512
IY
0.5519 in)
• Measure the outside diameter (fi) of the
rocker arm shafts.
Out of specification
-7
Replace.
Rocker arm outside diameter:
13.980
N
13.991 mm
(0.5504 - 0.5508 in)
• Calculate the clearance by subtracting the
rocker arm shaft outside diameter from
the rocker arm inside diameter.
Clearance greater than 0.08 mm
-7
Replace the defective part(s}.
Rocker arm
to
shaft standard
clearance:
0.009
IY
0.038 mm
(0.0035 - 0.0015 in)
**********************************
ROCKER ARM AND CAMSHAFT
INSTALLATION
1.Apply:
• Molybdenum disulfide oil
(onto the camshaft journals)
2.1nstall:
• Camshaft
CD
• Camshaft bushing
®
• Stopper plate
®
• Lock washer
® _
• Bolts (stopper plate)
®
4 - 19
~~20~N:"':"m~(2~.O~m---=.k-g~,'~4~.4"":"ft-.~lb~)
I