Yamaha MIO Service Manual page 115

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3
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d
c
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CYLINDER HEAD
3. Tighten:
• cylinder head nuts
• cylinder head bolts
NOTE:
_
• Lubricate the cylinder head nuts with engine
oil.
• Tighten the cylinder head nuts and bolts in
the proper tightening sequence as shown
and torque them in two stages.
4. Install:
• camshaft sprocket 1
• timing chain 2
M MMM M MMM M M MMM M
a. Check that the "I" mark a on the A.C. mag-
neto rotor is aligned with the stationary
pointer b on the crankcase.
b. Align the "I" mark c on the camshaft
sprocket with the stationary pointer d on
the cylinder head.
c. Install the timing chain onto the camshaft
sprocket, and then install the camshaft
sprocket onto the camshaft.
NOTE:
_
• When installing the camshaft sprocket, be
sure to keep the timing chain as tight as pos-
sible on the exhaust side.
• Align the projection e on the camshaft
sprocket with the slot in the camshaft.
CAUTION:
_
Do not turn the crankshaft when installing
the camshaft to avoid damage or improper
valve timing.
d. While holding the camshaft, temporarily
tighten the camshaft sprocket bolt.
e. Remove the wire from the timing chain.
L LLL L LLL L L LLL L
ENG
22 Nm (2.2 m · kg, 16 ft · lb)
10 Nm (1.0 m · kg, 7.2 ft · lb)
M MMM M M MMM M M MMM M
L LLL L L LLL L L LLL L
MMM
LLL