Yamaha MBK MW125 2014, Service Manual

Page: 218 / 380

CYLINDER HEAD
5-15
d. While holding the camshaft, temporarily tight-
en the camshaft sprocket bolt.
e. Remove the wire from the timing chain.
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3. Install:
• Timing chain tensioner gasket
• Timing chain tensioner
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a. Remove the timing chain tensioner plug.
b. While lightly pressing the timing chain ten-
sioner rod by hand, turn the tensioner rod ful-
ly clockwise with a thin screwdriver “1”.
TIP
Make sure that the tensioner rod has been fully
turned clockwise.
c. Install the gasket and the timing chain ten-
sioner “2” onto the cylinder.
WARNING
EWA17620
Always use a new gasket.
TIP
• Be sure to install the timing chain tensioner
gasket so that its projection “a” is protruding
from the rear left side of the timing chain ten-
sioner.
• Apply sealant to the threads of the timing chain
tensioner bolts.
d. Turn the timing chain tensioner rod counter-
clockwise with a thin screwdriver “1”, make
sure it releases, and then install the timing
chain tensioner plug.
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4. Turn:
• Crankshaft
(several turns clockwise)
5. Check:
• “I” mark “a”
Make sure the “I” mark “a” on the AC magne-
to rotor is aligned with the match mark “b” on
the right crankcase.
• “I” mark “c”
Make sure the “I” mark “c” on the camshaft
sprocket is aligned with the match mark “d”
on the camshaft stopper plate.
Out of alignment
→
Correct.
Refer to the installation steps above.
6. Tighten:
• Camshaft sprocket bolt
Yamaha bond No. 1215
90890-85505
(Three bond No.1215®)
T
R
.
.
Timing chain tensioner bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
New
1
T
R
.
.
Camshaft sprocket bolt
30 Nm (3.0 m·kgf, 22 ft·lbf)
1
2
a
b
a
d
c