Removing The Camshafts; Checking The Camshafts - Yamaha YZFR6X(C) 2008 Service Manual

EAS23810

REMOVING THE CAMSHAFTS

1. Remove:
• Pickup rotor cover
Refer to "PICKUP ROTOR" on page 5-29.
2. Align:
• TDC mark on the pickup rotor
(with the crankcase mating surface)
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a. Turn the crankshaft clockwise.
b. When piston #1 is at TDC on the compres-
sion stroke, align the TDC mark "a" on the
pickup rotor with the crankcase mating sur-
face "b".
b
a
NOTE:
TDC on the compression stroke can be found
when the camshaft lobes are turned away from
each other.
IN
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Remove:
• Camshaft caps "1"
ECA13720
CAUTION:
To prevent damage to the cylinder head,
camshafts or camshaft caps, loosen the
camshaft cap bolts in stages and in a criss-
cross pattern, working from the outside in.
4. Remove:
NOTE:
To prevent the timing chain from falling into the
crankcase, fasten it with a wire "1".
EAS23850

CHECKING THE CAMSHAFTS

1. Check:
EX
2. Measure:
5-9
CAMSHAFTS
• Intake camshaft
• Exhaust camshaft
1 1
• Camshaft lobes
Blue discoloration/pitting/scratches →
Replace the camshaft.
• Camshaft lobe dimensions "a" and "b"
Out of specification → Replace the cam-
shaft.