Yamaha YP125R, Service Manual

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CYLINDER HEAD (YP125R)
5-12
e. While holding the primary sheave nut with a
wrench, temporarily tighten the camshaft
sprocket bolt.
f. 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
EWA37P1001
Always use a new gasket.
TIP
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
(turn the primary sheave nut on the left side
of the crankshaft several turns counterclock-
wise)
5. Check:
• “I” mark “a”
Make sure the “I” mark “a” on the generator
rotor is aligned with the stationary pointer “b”
on the generator cover.
• “I” mark “c”
Make sure the “I” mark “c” on the camshaft
sprocket is aligned with the stationary pointer
“d” on the cylinder head.
Out of alignment
→
Correct.
Refer to the installation steps above.
Yamaha bond No. 1215
90890-85505
(Three Bond No.1215®)
h
g
New
1
T
R
.
.
Timing chain tensioner bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
2
1
b
a