Yamaha MBK MW125 2014, Service Manual

Page: 217 / 380

CYLINDER HEAD
5-14
d. Make sure that the timing chain tensioner rod
comes out of the timing chain tensioner hous-
ing smoothly. If there is rough movement, re-
place the timing chain tensioner.
e. Install the timing chain tensioner plug.
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EAS30282
INSTALLING THE CYLINDER HEAD
1. Tighten:
• Cylinder head nuts “1”
• Cylinder head bolts “2”
TIP
• Lubricate the cylinder head nuts “1” with the
molybdenum-disulfide grease.
• Tighten the cylinder head nuts and bolts in the
proper tightening sequence as shown and
torque them in two stages.
2. Install:
• Camshaft sprocket
• Timing chain
• Camshaft sprocket bolt
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a. Turn the crankshaft clockwise.
b. Align the “I” mark “a” on the AC magneto rotor
with the match mark “b” on the right crank-
case.
c. Install the timing chain “1” onto the camshaft
sprocket “2”, then the camshaft sprocket onto
the camshaft, and then finger tighten the
camshaft sprocket bolt.
TIP
• When installing the camshaft sprocket, be sure
to keep the timing chain as tight as possible on
the exhaust side.
• Align the projection “c” on the camshaft sprock-
et with the slot “d” in the camshaft.
• Align the “I” mark “e” on the camshaft sprocket
with the match mark “f” on the camshaft stop-
per plate.
NOTICE
ECA20600
Do not turn the crankshaft when installing
the camshaft sprocket to avoid damage or
improper valve timing.
T
R
.
.
Cylinder head nut
22 Nm (2.2 m·kgf, 16 ft·lbf)
T
R
.
.
Cylinder head bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
4
×
6
5
2
3
4
1
1
1
2
2
×
b
a
c
2
d
1
e
f