Yamaha YZF-R125 Service Manual page 187

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3. Install:
• Camshaft sprocket
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a. Turn the crankshaft counterclockwise.
b. Align the "I" mark "a" on the generator rotor
with the stationary pointer "b" on the genera-
tor cover.
c. Align the "I" mark "c" on the camshaft sprock-
et with the stationary pointer "d" on the cylin-
der head.
d. Install the timing chain onto the camshaft
sprocket, and then install the camshaft
sprocket onto the camshaft.
d
c
NOTE:
When installing the camshaft sprocket, be sure
to keep the timing chain as tight as possible on
the exhaust side.
ECA5D71012
CAUTION:
Do not turn the crankshaft when installing
the camshaft(s) to avoid damage or improper
valve timing.
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a
e. While holding the camshaft, temporarily tight-
en the camshaft sprocket bolt.
f. Remove the wire from the timing chain.
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4. Install:
• Timing chain tensioner gasket
• Timing chain tensioner
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a. Apply sealant to the timing chain tensioner
bolt threads.
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b. While lightly pressing the timing chain ten-
sioner rod by hand, turn the tensioner rod ful-
ly clockwise with a thin screwdriver "1".
c. With the timing chain tensioner rod turned all
the way into the timing chain tensioner hous-
ing (with the thin screwdriver still installed), in-
stall the gasket and the timing chain tensioner
"2" onto the cylinder block.
d. Tighten the timing chain tensioner bolts "3" to
the specified torque.
b
e. Remove the screwdriver, make sure the tim-
ing chain tensioner rod releases.
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5-12
CYLINDER HEAD
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Yamaha bond No. 1215
90890-85505
(Three Bond No.1215®)
Timing chain tensioner bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
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New
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