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Fuel System; Spark Plugs - Kawasaki KZ500 Manual

1979-1985.
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Table of Contents
LUBRICATION, MAINTENANCE AND TUNE-UP
53
Reach
---4
Too Short
Correct
Too Long
FUEL SYSTEM
As water and dirt accumulate in the fuel tank
or carburetor float bowls. engine performance
will deteriorate. The fuel system should be
cleaned when the engine is cold so gasoline
doesn't spill on hot surfaces.
U
2
RNIN(i
Sorne fiiel tnav sprll during these
proced~rres. Ubrk in a well-ventrlafed
area at k m ~ t
SO
/>el fiotn anv suarhs or
.
.
.
jlutnrs, including gas appliance pilot
lights. Do not smoke in the area.
Fuel System Cleaning
1. Check that the ignition switch is OFF.
2. Turn the fuel tap to PRI (prime).
3. Check to see how the carburetor overflow
tubes are routed (A. Figure 59). then pull them
up and put their ends into a container suitable
for gasoline.
4. Loosen one float bowl drain screw
1 or 2
turns (B. Figure
59).
Any accumulated water
will flow out of the attached overflow hose.
When clean gasoline comes out of the tube.
tighten the drain screw. Repeat for the other
carburetors. then reposition the overflow
tubes.
5. If any dirt came out of the carburetors,
inspect and clean the carburetors, fuel tap and
fuel tank as described in Chapter Seven.
6.
Make sure there are no leaks and that the
fuel lines are not cracked or worn out.
Fuel Line Replacement
The rubber fuel lines should be replaced
every 4 years. regardless of the mileage on the
bike; refer to Chapter Seven.
SPARK PLUGS
Heat Range and Reach
The proper spark plug is very important for
maximum performance and reliability. The
proper heat range requires that a plug operates
hot enough to burn off unwanted deposits. but
not hot enough to burn up or cause preignition.
A spark plug of the correct heat range will show
a light tan color on the portion of the insulator
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