Yamaha 2012 TMAX XP500A Service Manual page 277

TIP
• Lubricate the camshaft cap bolt seats with
the engine oil.
• When tightening the camshaft cap, tighten
the four bolts on the both ends of the cap
temporarily to lower the entire cap, while pay-
ing attention not to twist the dowel pins and
camshaft journal. After the camshaft cap
touches the cylinder head, tighten the two
bolts in the middle to the specified torque
and then the remaining four bolts to the
specified torque.
• To prevent the camshaft cap from cracking,
tighten the camshaft cap carefully by tapping
the camshaft using a soft-face hammer (both
for temporary and final tightening).
4. Install:
• Timing chain tensioner gasket
• Timing chain tensioner
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a. Push the timing chain tensioner rod "1" into
the timing chain tensioner housing by
hand.
TIP
While pushing the timing chain tensioner rod
"a", turn it clockwise "b" with the timing chain
tensioner body "2" until if stops.
b
b. Lock the timing chain tensioner rod by set-
ting the circlip "3" into groove "4" while
pushing the timing chain tensioner rod.
3
4
c. Install the timing chain tensioner to the cyl-
TIP
Always use a new gasket.
d. Release the timing chain tensioner rod by
ECA4B51014
Do not push up the timing chain. Push up
"c" the timing chain guide "5".
New
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5. Turn:
6. Check:
2
a
1
5-16
inder block.
Timing chain tensioner bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
pushing up the timing chain guide "5" from
the hole "6".
• Crankshaft
(several turns clockwise)
• "I" mark "a"
Make sure that the "I" mark is aligned
with the stationary pointer "b" on the gen-
erator cover.
• Camshaft sprocket alignment marks "c"
and "d".
Make sure that the camshaft sprocket
alignment marks are aligned with the cyl-
inder head mating surface.
Out of alignment → Correct.
Refer to the installation steps above.
CAMSHAFTS