Yamaha 2007 XP500 Service Manual page 225

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2
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a. Turn the crankshaft counterclockwise.
b. When piston #1 is at TDC on the compres-
sion stroke, align the "I" mark "a" on the A.C.
magneto rotor with the stationary pointer "b"
on the A.C. magneto cover.
c. Install the timing chain onto both camshaft
sprockets, and then install the camshafts
onto the cylinder head.
NOTE:
The camshafts should be installed onto the cyl-
inder head so that the alignment mark "c" on the
intake camshaft sprocket and the alignment
mark "d" on the exhaust camshaft sprocket align
with the cylinder head mating surface, as shown
in the illustration.
ECA15B1024
CAUTION:
Do not turn the crankshaft when installing
the camshafts to avoid damage or improper
valve timing.
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2. Install:
Dowel pins
G
Intake camshaft cap "1"
G
Exhaust camshaft cap "2"
G
Camshaft cap bolts
G
Camshaft cap bolts
10 Nm (1.0 m•kg, 7.2 ft•lb)
ECA15B1025
CAUTION:
The camshaft cap bolts must be tightened
evenly or damage to the cylinder head, cam-
shaft cap, and camshafts will result.
NOTE:
Lubricate the camshaft cap bolt threads with en-
gine oil.
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3. Install:
Timing chain tensioner gasket
G
Timing chain tensioner
G
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a. Push the timing chain tensioner rod "1" into
the timing chain tensioner housing by hand.
NOTE:
While pushing the timing chain tensioner rod "a",
turn it clockwise "b" with the timing chain ten-
sioner body "2" until if stops.
b. Lock the timing chain tensioner rod "1" by set-
5-12
CAMSHAFTS
New
b
a
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