Checking The Camshaft Sprockets; And Timing Chain Guides - Yamaha XP500 Service Manual

CAMSHAFTS
c. Install the dowel pins and camshaft caps.
NOTE:
• Tighten the camshaft cap bolts in stages and
in a crisscross pattern, working from the
inner caps out.
• Do not turn the camshaft when measuring
the camshaft-journal-to-camshaft cap clear-
ance with the Plastigauge
Camshaft cap bolt
10 Nm (1.0 m · kg, 7.2 ft · lb)
d. Remove the camshaft caps and then mea-
sure the width of the Plastigauge
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5. Measure:
• camshaft journal diameter a
Out of specification → Replace the cam-
shaft.
Within specification → Replace the cylinder
head and the camshaft caps as a set.
Camshaft journal diameter
22.967 ~ 22.980 mm
(0.9042 ~ 0.9047 in)

CHECKING THE CAMSHAFT SPROCKETS,

AND TIMING CHAIN GUIDES

The following procedure applies to all of the
camshaft sprockets and timing chain guides.
1. Check:
• camshaft sprocket
More than 1/4 tooth wear a → Replace the
camshaft sprockets and the timing chain as
a set.
a 1/4 tooth
b Correct
1 Timing chain roller
2 Camshaft sprocket
5 - 12
ENG
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