CHAPTER 3B ENGINE 50cc/80cc ATV SERVICE MANUAL09.0
CHAPTER 3B ENGINE PAGE 3B - 61 -
Securely tighten the clamp screw to fix the
carburetor in place. Do not over tighten the screws
as this can cause damage to the manifold.
Attach the inlet pipe to the rear of the carburetor
and tighten the clamp screw.
Attach the throttle cable to the throttle on the
throttle plage.
Use the adjusting nut and stop nut to set the cable
tension,
Correct adjustment should allow 1/4 inch of free
play in the cable.
Attach the fuel line from the tank to the inlet on the
carburetor and clamp securely.
Connect the wiring harness form the auto choke to
the proper connection on the main wiring harness.
After starting the engine, set the idle speed using
the idle adjusting screw.
Carburetor Adjustment
·It is generally not necessary to adjust the mixture
screw on the side of the carburetor. This screw is
preset at the factory and will have little affect on the
performance of the carburetor.
If this screw has been removed for cleaning of the
carburetor, it should be reset carefully.
The standard setting is 2 turns out + -1/4 turn.
·To set this position, run the engine until warm and
allow it to idle. Turn the screw in or out a little at a
time and measure the idle RPM. The correct
setting is achieved when the idle speed is
maximized.
Adjust the idle speed of the engine once the
engine had been warmed up.
Set the warm idle speed to 1900RPM +or–
190RPM.
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