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Table of Contents
116 MAINTENANCE-ENGINE
Table
H1
Carburetor Specifications
Main Jet
Air
Jet
Type
Primary
Second,try
Pilot
Primary
Main
CV32
170
Left 7 5
130
1
50
Right 80
buretor trouble: too
rich
a
mix
ture (too
much
fuel)
;
or too lean a mix
ture (too little fuel).
Such trouble
can be
caused
by d irt, wear,
mal adjustment,
or improper
fuel
level
in
the
float
chamber.
A
dirty
o
r
damaged
air
cleaner can also al ter the
fuel-to-air ratio.
Table H2
Mixture Trouble Symptoms
Mix
tu
re
too
rich
Mixture
too lean
Engine
is
sluggish
Engine overheats
Smoky exhaust
Runs
better
with choke
Runs worse when warm
lever
pul
led
up
Spark
plug fouled
black
Spark plug
burned
white
Runs better
without
air
Running
is
unstable
cleaner
Loss
of
power
The
fol lowing
explanat
ion
of
the
functioning and
main
tenance
of
the
carburetors covers
the
four
main
systems for fuel
regulation
and supply.
Table H3
Carburetor
Systems
System
Function
Starter System
Supplies
the
necessary rich mix ture
for
starting
a cold
engine.
Pilot System
Supp lies
fuel
at
idl ing
and
low
speeds.
Main
System
Supplies
fue
l
at medium and
high
speeds.
Float System
Maintains the
fuel
at
a constant
level in the
float
chamber.
[~J!E~~
1
.
~er;~~:a:~~ ~~:P::r~;e:;:
~~~a!o~~
pressed air, or they will be damaged.
2.
Remove
as
many
rubber or plastic parts from the
carburetors (Table
H4)
as possible before cleaning
the carburetors with a cleaning solution.
This
will
prevent
damage
or deterioration of the parts.
3. The carburetor body has plastic parts {Table H4)
that cannot be removed. DO NOT use a strong car-
buretor
cleaning solution which could attack these
parts;
instead, use
a
mild
cleaning solution safe for
plastic parts.
Fuel
Level
Pil
ot
Pilot
Secondary
Jet
Screw
Design
Service
Main
60
38
l
-l4
32-34
1.5-3.5
turns out
mm
mm
4. Do not use wire for cleaning as this could
damage
the jets.
Table H4
Carburetor Rubber Parts and Plastic Parts
Parts
Quantity
Removable
Breather
Tu
bes
2
Yes
Floats
2
Yes
Float Bowl O
Rings
2
Yes
Fuel Hose
1
Yes
Idle
Adjusting Screw
1
Yes
Idle
Limi
ter
2
Yes
Jet
Needle
Holder
2
Yes
Overflow
Tubes
2
Yes
·
Pilot Screw O
Rings
2
Yes
Pilot Jet
Ru
bber
Plugs
2
Yes
3-way
Joint
O
Rings
4
Yes
Vacuum
Pistons
2
Yes
Starter System
In
order
fo
r the starter system to
work
properly,
the
choke
lever
must be pushed up
fully
so that
the
choke
valve
wil
l be
kep
t
closed and
sufficient
vacuum
can
be
built up
at
the
engine
of the carburetor
bore.
Clogged
pilot
jet,
main
jets, pilot
air
jet,
needle
jet
holder
and
main jet
bleed
pipe
will
cau se insufficient
atomization,
thus
impairing
starter
efficiency. Fuel
mixture
trouble
results
if
choke
lever
link
mechanism,
pilot and main
system
is
defective.
A
damaged
relief valve
will
cause
insufficient
vacuum, thus
impairing
starter system
effi-
ciency.
Fuel
mixtu
re trouble
results if
the choke valve
does no
t
open
fully
after the choke lever is returned
.
Cleaning and inspection
Disassemble the
carb
uretor,
and
wash the
main
jets,
pilot jet, needle jet
holder,
main jet bleed
pipe,
air
jets,
and
air
passage with
a
high
flash-po
int
solvent,
blowing them
clean
with
compressed air.
If
necessary,
use a
bath o
f
automotive
type
carburetor
cleaner.
Pu
ll
up
and push
down
the
choke
lever to
check that
the
choke
valves
move smoothly.
The choke
valves
must
close the
carb
uretor
bores
completely
when
the
lever
is
pulled
up,
and
must
open
fully
when
the lever is
pushed
down.
If necessary,
adjust the choke
li
nkage
(Pg. 42).
To check
that
the rel
ief valve
spring
is
working
properly,
push
on the relief valve
itsel
r.
The
relief
valve must
move
smooth
ly,
and
must close
by
spring
tension.
If
the choke
valve
or
the
relief
valve
does
not
work
properl
y,
replace the
carburetor
body.

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Table of Contents

   Also See for Kawasaki Z250 1981

This manual is also suitable for:

Kz350 1981

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