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Yamaha F50A - Checking the Valve Clearance

Yamaha F50A
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62Y3A11
3-10
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13. Install the flywheel magnet and flywheel
magnet cover.
È
For USA and Canada
É
For worldwide
CAUTION:
Apply force in the direction of the arrows
shown, to prevent the flywheel holder
from slipping off easily.
NOTE:
Apply engine oil to the flywheel magnet nut
before installation.
Checking the valve clearance
1. Remove the flywheel magnet cover, and
then disconnect the high-tension cords
and blowby hose
1
.
2. Remove the spark plugs, fuel pump
2
,
and cylinder head cover
3
.
3. Turn the flywheel clockwise and align the
1 mark
a
on the driven sprocket with
the “” mark
b
on the cylinder head.
CAUTION:
Do not turn the flywheel counterclock-
wise, otherwise the valve system may be
damaged.
4. Check the intake valve clearance for cyl-
inders #1 and #2, and the exhaust valve
clearance for cylinders #1 and #3. Adjust
if necessary.
Flywheel magnet holder: YB-06139
Flywheel holder: 90890-06522
Flywheel magnet nut:
160 N·m (16 kgf·m, 116 ft·lb)
Power unit

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