Yamaha 2012 Grizzly 300 Service Manual page 133

ROCKER ARMS AND CAMSHAFT
a
EAS00205
CHECKING THE CAMSHAFT
1. Check:
camshaft bushings
•
Damage/wear
2. Check:
camshaft lobes
•
Blue discoloration/pitting/scratches
Replace the camshaft.
3. Measure:
camshaft lobe dimensions a and
•
Out of specification
shaft.
Camshaft lobe dimension limit
Intake
a a a a a 34.880 mm (1.3732 in)
b
<Limit>: 34.860 mm (1.3724 in)
b b b b b 34.740 mm (1.3677 in)
<Limit>: 34.725 mm (1.3671 in)
Exhaust
a a a a a 34.880 mm (1.3732 in)
<Limit>: 34.860 mm (1.3724 in)
b b b b b 34.740 mm (1.3677 in)
<Limit>: 34.725 mm (1.3671 in)
4. Check:
camshaft oil passage
•
Obstruction
air.
4-13
ENG
Replace.
b
Replace the cam-
Blow out with compressed