Yamaha YZF-R1P Service Manual page 252

CAMSHAFT
CAUTION:
_
The camshaft cap bolts must be tightened
evenly or damage to the cylinder head,
camshaft caps, and camshafts will result.
4. Install:
• intake camshaft sprocket
• exhaust camshaft sprocket
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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 with the
crankshaft mating surface b.
c. Install the timing chain onto both camshaft
sprockets and then install the camshaft
sprockets onto the camshafts.
NOTE:
_
When installing the camshaft sprockets, start
with the exhaust camshaft and be sure to keep
the timing chain as tight as possible on the
exhaust side.
CAUTION:
_
Do not turn the crankshaft when installing
the camshaft to avoid damage or improper
valve timing.
d. Turn both camshafts opposite each other so
that the punch mark a on the camshaft is
aligned with the arrow mark b in the cam-
shaft cap as shown.
e. While holding the camshafts, temporarily
tighten the camshaft sprocket bolts.
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5. Install:
• timing chain guide (exhaust side)
5 - 16
ENG
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L LLL L L LLL L L LLL L LLL