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Ignition System; Safety Instructions; Ignition Coil Removal; Ignition Coil Installation - Kawasaki KX125 1990 Service Manual

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13·10
ELECTRICAL
SYSTEM
Ignition
System
Safety
Instructions
AWARNING
The ignition system
produces extremely
high
vol·
tage
.
00 not
touch
the
spark
plug
,
high tension
coil
.
or
spark
plug
lead
while the engine is
run-
ning
.
or you
could
receive a severe electrical
shock.
Ignition
Coif
Removal
-
Remove
the
followi ng
pa
rts.
Seat
Radiator
Covers
Fuel
Tank
-
Di sconnect the ignition
coi
l
primary
leads.
.
Pull the
plug
cap
off
the spark
plug.
-
Unscrew the mounting
bolt,
and remove the
ignition
coi
l.
A.
Ignition
Coil
C.
Plug
Ca
p
B.
Primary
lead
Ignition Coil Installation
-I
nstallation
is
the reverse of
remova
l.
Ignition Coif Inspection
Measuring
arcing
distance:
\
The
most
accurate test for
determining the
condi-
tion of the
ignition
coi
l
is
made
by
measuring arcing
distance with
the
coil teste
r
(special
tool) for the
3-needle
method
.
NOTE
oSince
a
tester
other
than the
coil
tester
(special
tool:
57001-1241)
may
produce
a
different arcing
distance, the
coil
tester is recommended for
reliable
results.
-
Remove
the
ignition coil.
-
Connect
the ignition
coil
(with the
spa
rk plug
cap
left installed
on the
spa
rk
plug lead)
to
the
tester,
and
measure the
a
rcing
d
ista nce
.
Ignition Co iI Test
110
i0
Bl
ki
@
~
e
CV
~
0
0
1.
Coil
Tester;
57001-1242
2.
Ignition
Coil
AWARNING
To avoid extremely high voltage
shocks,
do
not
touch the
call
or lead
.
*
If
the
distance
reading is
less
than
the specified
value,
the ignition
coil o
r
spark
plug cap is
defective.
3
Needle Arcing Distance
7
mm or more
-
To determine
which
part
is defective,
measure the
arCing
dista nce
again
with the
spark plug
cap
re-
moved
from
the ignition
coil
lead.
*
If
t he arcing distance is
subnormal
as
before, the
trouble is
with
the
ignition coil
itse
lf.
If
the
a
rci
ng
distance is now
normal. the
t rouble is
with
the spark
plug
cap.
Measuring
coil
resista
nce;
If the
arcing tester
is
not
available,
the
coil can
be
checked for a
broken
or
badly
shorted
wi nding
with
an
ohmmeter.
However,
an ohmmete
r cannot
detect
layer shorts
and
shorts
resulting
f rom insu lation
breakdown
under high
voltage.
-
Remove
the
ignition coil.
-
Measure
the primary
winding
res
istance.
OConnect
an
ohmmeter
between the
coil
term
inals.
oSet the meter
to
the
x
10
ra nge,
and
read
the
meter.
-
Measu re t he secondary windi ng
resistance.
oPuli the spark plug
cap off the
lead.
OConnect an
ohmmeter
between
the
spark plug lead
and
the
ground
lead
terminal.
aSet
the
meter to the
x
1
kO
range,
and read
the
meter.
*
If
the meter does
not
read as
specified,
replace
the
coil.
Ignition Coli Winding Resistance
Primary windings
:
0 .310
±
15%
Secondary windings
:
4.1 kD
±
15%

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