Yamaha XP500 - Page 342

5 - 11
ENG
CAMSHAFTS
2. Measure:
• camshaft lobe dimensions a and b
Out of specification → Replace the cam-
shaft.
3. Measure:
• camshaft runout
Out of specification → Replace.
Camshaft lobe dimension
Intake
a
33.252 ~ 33.352 mm
(1.3091 ~ 1.3131 in)
<Limit>:
33.152 mm (1.3052 in)
b
24.956 ~ 25.056 mm
(0.9825 ~ 0.9865 in)
<Limit>:
24.856 mm (0.9786 in)
Exhaust
a
33.252 ~ 33.352 mm
(1.3091 ~ 1.3131 in)
<Limit>:
33.152 mm (1.3052 in)
b
24.956 ~ 25.056 mm
(0.9825 ~ 0.9865 in)
<Limit>:
24.856 mm (0.9786 in)
Camshaft runout limit
0.03 mm (0.0012 in)
4. Measure:
• camshaft-journal-to-camshaft-cap clear-
ance
Out of specification → Measure the cam-
shaft journal diameter.
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a. Install the camshaft into the cylinder head
(without the dowel pins and camshaft caps).
b. Position a strip of Plastigauge
®
1 onto the
camshaft journal as shown.
Camshaft-journal-to-camshaft-
cap clearance
0.020 ~ 0.054 mm
(0.0008 ~ 0.0021 in)
<Limit>: 0.08 mm (0.0031 in)