Yamaha VMX12 2001 Service Manual page 142

CAMSHAFTS
3. Measure:
• camshaft runout
Out of specification → Replace.
Camshaft runout limit
0.03 mm
4. Measure:
• camshaft-journal-to-camshaft-cap clear-
ance
Out of specification → Measure the cam-
shaft journal diameter.
Camshaft-journal-to-camshaft-
cap clearance
0.020 ~ 0.054 mm
a. Install the camshaft into the cylinder head
(without the dowel pins and camshaft caps).
b. Position a strip of Plastigauge
camshaft journal as shown.
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)
d. Remove the camshaft caps and then mea-
sure the width of the Plastigauge
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
24.967 ~ 24.980 mm
4 - 12
ENG
1 onto the
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