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Kawasaki Z250 1981 Service Manual Page 25

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Table of Contents
Idling
Adjustment:
•Start the engine
and
warm
it up
for
five
minutes.
•Turn the
idle
adjusting screw
until
the engine
is at
the lowest
smooth
rpm.
•Adjust
the
pilot
screw
of each carburetor, one
at
a
time,
to
obtain
highest
idle speed.
This pilot screw
adjustment will be within
Yi
turn in
or
out from
the
specified
setting.
A.
Pilot
Screw
•Turn
the
idle adjusting screw
to set
idle speed to
1,200
-1,300 rpm.
•Make
sure th
at engine rpm does not
rise
when
the
pilot screw positions are altered.
If
it
does,
repeat
the last three
steps.
•Open and close the throttle a
few times
to make
sure
that
the idle
speed
does
not
change. Readjust if
neces-
sary.
•With the engine
idling, turn the handlebar
to
eash
side.
If
handlebar movement changes idle speed, the throttle
cables may be
improperly
adjusted
or
incorrectly
routed,
or
they
may
be
damaged.
I
WARNING
I
Operation with improperly
adjusted, in-
...,.
- - - - • -
correctly
routed, or damaged cables
could
result in
an unsafe
riding
condition_
NOTE:
If idling adjustment has
resul
ted
in
failure, check
the
following and correct if
necessary.
Carburetor
Function
Checks
(Pg. 42)
Engine Oil (Pg. 21)
Spark Plugs (Pg.
12)
Ignition
Timing
(Pg.
12)
Throttle Cables
(Pg.
17)
Cylinder Compression
(Pg. 127}
Air
Cleaner Element (Pg.
11
5)
Camshaft Chain
(Pg.
16)
Valve Clearance (Pg. 16)
Carburetor Synchronization:
Adjustment
of carburetor synchronization,
necessary
for smooth engine operation, can
be obtained through
the use of
either
of the following
two
procedures, de-
pending
on
whether
or not
vacuum
gauges are available.
NOTE:
During both of
the
procedures, the
fuel
tank
will
be
removed. In most cases,
it
will be necessary to
temporarily
replace
the
standard
fuel
lines
with lines
ADJUSTMENT-ENGINE 19
long
enough
to
reach the fuel
tank
while it
is
located
on your workbench.
I
WARNING •
Use extreme caution when working with
...,. - - - - • - gasoline, open fuel
lines,
etc.
to
avoid
a fire or explosion.
Without Vacuum Gauges:
•Start the engine,
and
warm
it
up
for 5 minutes.
•Perform the
idling
adjustment.
•Listen
to
the exhaust
noise,
and place your hands at
the rear
of
the
mufflers to feel exhaust pressure.
•If
there
is
a
difference in noise
or exhaust pressure
be-
tween
the
cylinders,
stop
the
engine,
remove the
fuel
tank (Pg. 39), and
supply fuel to
the
carburetors
by
some means. With
the
engine
running,
alter the balance
adjusting screw
position
with
the balance adjuster
(special tool)
to
minimize the
difference in noise
or
exhaust
pressure.
A_ Balance Adjuster (57001-351)
B. Locknut
C.
Balance
Adjusting Screw
•Adjust
the id
le
speed
with the
idle
adjusting screw,
if
necessary.
•Recheck
the
exhaust noise and pressure, and if there
is
a difference between the cylinders,
repeat
the
last
2 steps.
•When
the balance
adjusting
screw
is
properly position-
ed,
tighten the locknut,
stop
the
engine, and install
the
ruel
tank
(Pg.
39).

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Kz350 1981

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