Checking The Valve Clearance - Yamaha F80B Service Manual

Checking the valve clearance

CAUTION:
• Do not turn the flywheel magnet coun-
terclockwise, otherwise the valve sys-
tem may be damaged.
• Do not remove the ignition timing
pointer.
• Do not turn the flywheel magnet or the
driven sprockets when the timing belt is
not installed. Otherwise the piston and
valves will interfere with each other and
be damaged.
NOTE:
For removal and installation procedures of
the timing belt, driven sprockets, and cam-
shafts, see the applicable procedures in this
manual.
1. Remove the flywheel magnet cover 1,
filter 2, and spark plug wire cover 3,
disconnect the spark plug wires 4, fuel
hoses 5, and blowby hose 6, and then
remove all spark plugs.
5
2
2. Turn the flywheel magnet clockwise and
align the "TDC" mark a on the flywheel
magnet with the pointer b, and check
that " " marks c and d on the driven
sprockets are aligned.
6D93G11
3. Loosen the tensioner bolt 7, and then
remove the spring 8, timing belt 9,
driven sprockets 0, and cylinder head
cover A.
1
6
3
4
S6D85130
c
0
7
Power unit
d
1
2
3
a
b
S6D85140
4
5
0
8
6
A
9
7
8
S6D85150
9
5-10