Maintenance Instructions ADJUSTMENTS
69
Carburetor
Carburetor adjustments are required to compensate
for differences in altitude, temperature, and fuel.
Once the carburetor has been set, no further adjust-
ments should be required. However, if the engine
exhibits any of the following symptoms, the carbure-
tor adjustment should be checked: black, sooty ex-
haust smoke, lack of power, engine miss or backfire,
hard to start, rough running or idle.
NOTE: Also refer to the Kawasaki Service Manual
for detailed carburetor adjustment information.
NOTE: The air cleaner and air intake hose must be
connected to the carburetor when adjusting the car-
buretion.
The carburetor main jet is fixed (non-adjustable). For
operation above 5,000 ft (1,524 m) above sea level,
the carburetor main jet should be changed for best fu-
el economy and power. Contact an authorized Ka-
wasaki engine dealer to change the carburetor main
jet.
To adjust the carburetor for engine idle, use the fol-
lowing procedure:
1. Gently close the idle mixture needle valve by
turning it clockwise until it bottoms lightly.
IMPORTANT: The needle valve and carburetor
seat may be damaged by turning the adjustment
screw too tight.
Carburetor Adjustment
2. Preliminary Setting: Turn the idle mixture needle
valve out (counterclockwise) 2 turns from the
closed position. This initial adjustment will al-
low the engine to be started and warmed up prior
to the final adjustment.
3. Start the engine and allow it to warm up for ap-
proximately five (5) minutes.
4. Move throttle to the IDLE position. Adjust idle
speed for 1300 RPM by adjusting the idle speed
screw. Check the idle speed using a tachometer.
5. With the engine idling, adjust the idle mixture by
turning the needle valve until the engine slows
(clockwise - lean mixture). Then turn the needle
valve out past the smooth operating point until
the engine slows again (counterclockwise - rich
mixture). Now turn the needle valve to the mid-
point between rich and lean mixture. Check en-
gine acceleration from the idle. If the engine will
not accelerate properly, readjust the idle mixture,
usually to a slightly richer mixture (open the
valve).
CAUTION
DO NOT change the engine governor set-
tings or overspeed the engine. The gov-
ernor has been factory-set for maximum
safe engine operating speed.
CAUTION
ALWAYS use the proper engine service
manual when working on the engine. Un-
authorized maintenance operations or
modifications to the engine MAY result in
unsafe operating conditions.
DANGER
The engine must be running to adjust
the carburetor for engine idle. To guard
against injury, keep hands, feet, face, and
other parts of body away from the muffler/
exhaust pipe, other hot parts of the engine,
and moving or rotating parts of the engine.
Idle Speed
Screw
Idle Mixture
Needle Valve
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