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Carburetor; Idle Speed Inspection; Idle Speed Adjustment; Service Fuel Level Inspection - Kawasaki KX125 1990 Service Manual

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2-8 FUEL SYSTEM
Carburetor
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Since
the carburetor
regu lates
and mixes
the
fuel
and air
going
to
the
engine.
there are two general
types
of carbu retor
trouble:
too
rich a
mixture
(too
much
fuel),
and too
lean
a mixture
(too
little
fuel).
Such
trouble
can
be
caused
by
dirt.
wear, maladjust-
ment,
or improper
fuel level
in
the
float
chamber.
A dirty or damaged air cleaner
can
also alter the fuel
to air
ratio.
Idle Speed Inspection
-
Start the
engi ne
and wa
rm
it
up
thoroughly.
-
With the engine
id ling,
turn
the
handlebar
to
both
sides.
,f
handlebar movement
changes
the
idle
speed, the
throttle
ca
ble may
be
improperly
adju sted
or
incorrectly routed,
or
it
may
be
damaged
.
Be sure
to
correct
any of these conditions before
riding
(see
Cable
Routing in the
Cenera
llnformation
chapter).
'~WARNING
Operation with an
Improperly
adjust
ed.
incorrect
-
ly routed
.
or damaged
cable
could (esult In an
un-
saf
e
riding condition
.
-
Check
idle
speed
.
*Ad
just
it
as
needed.
Idle Speed A djustment
-
Start the
engine and warm it
up
thoroughly.
-
First
turn in the air
screw-
until
it seats
tightly,
and
back it out
1
112
turns.
-
loosen the locknut and tum the idle adjusting screw
to obtain
the
desired idle
speed.
If
no
idle
is
preferred, tum out
the
screw-
until the engine
stops.
A.
Idle Adjusting Screw
C. Air Screw
B.
l
ocknut
-
After adjustment, tighten the
locknut
-
Open
and
close
the
throttle a few
times
to
make
sure
that
the
idle
speed is
as
desi red. Readjust if
necessary.
Service Fuel Level Inspection
AWARNING
GasoNne
is
extremety flammable and can be
axpk)-
s iva
under certain conditions.
Always s
top
the
an-
gine and do not
smoke.
Make sure
the
are8 is
weD
vantiated and free from any source of flame or
sparks;
this
Includes
any appliance wtth a
piat light
.
-
Tum the fuel
tap
to
the OFF
position.
-
Remove
the
fuel
tank.
-
Remove
the carburetor, and hold
it
in
true
vertical
position on
a
stand.
The
fuel hose and carburetor
cable do not have to
be removed to inspect
the fuel
level.
-
Put
the
fuel tank
on
a bench,
and connect the fuel
tap to the carburetor
using a
suitable
hose.
-
Remove
the
drain plug from
the bottom of the
float
bowl,
and
screw-
a fuel
level
gauge (special
tool)
into
the
plug
hole.
-
Hold the gauge
vertically
against the
side
of car-
buretor body
SO
that
the
"zero"
line
is
several milli-
meters higher
than the bottom edge of the carburetor
body.
-
Turn
the fuel
tap
to
the
ON IX>sition to feed fuel to
the
carburetor.
-
Wait
until
the
fuel
level in the gauge
settles.
-
Keeping
the gauge vertical, slowly
lower the gauge
until
the
"zero"
line
is even with the bottom edge
of
the carburetor
body.
NOTE
000
not lower
the
"zero"
line below
the
bottom edge
of
the
carburetor
body.
If
the gauge is
lowered
and
then
raised
again,
the
fuel
level
measure shows
somewhat
higher than
the
actual fuel level.
If the
gauge is
lowered
too
far,
dump the fuel
out
of
it
into
a
suitAble
container
and
stArt
the
procedure
over
again.
-
Read
the
fuel
level
in
the gauge and
compare
it
to
the
specification.
_
Turn
the
fuel
tap
to
the
OFF position and
remove
the fuel level
gauge.
Install the drain plug on the
bottom of
the
float
bowl.
*
If the fuel
level
is incorrect,
adjust
it.

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