Checking The Valve Clearance - Yamaha F50A Service Manual

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.
Flywheel magnet holder: YB-06139
Flywheel holder: 90890-06522
Flywheel magnet nut:
160 N·m (16 kgf·m, 116 ft·lb)

Checking the valve clearance

1. Remove the flywheel magnet cover, and
then disconnect the high-tension cords
and blowby hose 1.
62Y3A11
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.
Power unit
1
2
3
4
5
6
7
8
I
3-10