Yamaha F40B - Checking the Timing Belt and Sprocket; Installing the Sprocket and Timing Belt

67C3K11 5-24
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Checking the timing belt and
sprocket
1. Check the interior and exterior of the tim-
ing belt. Replace if cracked, damaged, or
worn.
2. Check the drive sprocket and driven
sprocket. Replace if cracked, damaged,
or worn.
Installing the sprocket and timing
belt
CAUTION:
Unless directed to do so in the following
instructions, do not turn the crankshaft or
camshaft when the timing belt is not
installed. Otherwise the pistons and
valves will collide with each other and be
damaged.
1. Install the Woodruff key 1 and drive
sprocket 2.
2. Install the dowel 3, driven sprocket 4,
and washer 5, and then install the bolt
6 temporarily.
NOTE:
Apply engine oil to the driven sprocket bolt 6
before installation.
3. Hold the driven sprocket using the spe-
cial service tool 7, and then tighten the
bolt 6 to the specified torque.
NOTE:
Make sure that the driven sprocket does not
turn when tightening the bolt 6.
4. Align the “1 ” mark a on the driven
sprocket 4 with the “” mark b on the
cylinder head.
S67C5056
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1
S67C5059
6
5
4
3
E
Flywheel holder 7: 90890-06522
T
R
.
.
Driven sprocket bolt 6:
38 N·m (3.8 kgf·m, 28.0 ft·lb)
S67C5061
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6
S67C5062
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a
b
Timing belt and sprocket