Kawasaki KX65 - Owner's Manual - page 115
114
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A. Main Jet
WARNING
Gasoline is extremely flammable and can be
explosive under certain conditions, creat-
ing the potential for serious burns. Do not
smoke. Make sure the area is well-ventilated
and free from any source of flame or sparks;
this includes any appliance with a pilot light.
Jet Needle and Needle Jet
The jet needle and needle jet together have their
greatest effect in the 1/4-to-3/4-throttle range. The
needle moves in and out of the needle jet. Since the
needle is tapered, its position in the needle jet deter-
mines the amount of fuel allowed to pass through.
There are five grooves in the top of the jet needle
in which a clip fits. This clip positions the jet needle
in the throttle valve relative to the needle jet.
Moving the clip down has the effect of pulling the
needle further out of the jet; the mixture is thereby
enrichened. Moving the clip up leans the mixture.
Change the clip position one step at a time.
The straight section of the jet needle affects the
throttle response at smaller throttle openings.
If changing the clip position does not provide the
proper setting, the needle jet may be changed. This
will make a large difference in the amount of fuel
provided.