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New Service Procedure - Yamaha EX440D Supplemental Service Manual

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1980
EX440D
1. NEW SERVICE PROCEDURE
(New service procedure applied to the
1980
EX440D)
A.
Ignition
timing
1. Remove
t he reco il starter assembly.
2.
Remove the
right side spark plug and
screw dia
l
gauge stand into spark
plu
g
ho le.
Too
l
name
Tool No.
Dial
gauge
stand
90890-0 1195
2
. In
sert
dia
l
gage w ith needle into stand
.
Tool
name
Too
l
No.
Dial
gauge
90890-01252
Dial
gauge needle
90890-03098
4
.
Rotate magneto f lywheel unti
l
piston is
at
top
-dead-center (T.D.C.)
Set the zero on dial gauge face to line
up
exactly with a dial gauge needle
.
Tighten set screw on dial gauge stand
to secure dial gauge assembly
.
Rotate
flywhee
l
back and forth to be sure that
indicator
need le does not go past zero.
5
.
Starting
at
T.D.C
.,
rotate
flywhee
l
counterclockwise
until
dial
gauge
reads approx imate ly 3-1
/
2 need le re
-
volutions
before-top
-
dead -cente r
(B .T.D .C.)
.
6
.
Slowly turn flywheel clockwise until
dial
gauge
reads
specified ign
iti
on t im-
ing.
Ign ition
timing
(B.T.D .C.)
1.6
±
0
.1
mm (0.060
±
0.004
in)
-
2-
7. Chec
k
the
marks
on flywhee
l
and pu lser
for
ali
gnment.
If
not
al igned, adjust ignition t iming as
follows:
a. Loosen the
pulser
set screws and turn
the pu lser unti
l
mark
alignment is
achieved.
\
...&.
\
~,
NOTE: -------------------------
If the marks can not be aligned by this ad
-
justment.
remove
the flywheel roto
r
and
turn
the
base (stator) assemb
ly.
(
)
l )

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