Checking The Camshaft - Yamaha XF50W Service Manual

THE ROCKER ARMS AND CAMSHAFT
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EAS00205

CHECKING THE CAMSHAFT

1. Check:
2. Check:
3. Measure:
X \
11151001
4. Check:
5-15
ENG
•camshaft bushings
Damage/wear -» Replace.
•camshaft lobes
Blue discoloration/pitting/scratches
Replace the camshaft.
•camshaft lobe dimensions a and b
Out of specification -*
shaft.
Camshaft lobe dimension limit
Intake
a30.158~30.258mm
(1.1873~1.1913 in)
<Limit>:30.058mm (1.1834 in)
b25.082~25.182mm
(0.9875~0.9914 in)
<Limit>:24.982mm (0.9835 in)
Exhaust
a30.158~30.258mm
(1.1873~1.1913 in)
<Limit>:30.058mm (1.1834 in)
b25.020~25.120mm
(0.9850~0.9890 in)
<Limit>:24.920mm (0.9811 in)
•camshaft oil passage
Obstruction -* Blow out with compressed
air.
-*
Replace the cam-