Repair manual KTM LC4
Art.-Nr
. 3.206.014 -E
Full-load system (Mikuni BST 40)
When the throttle valve is opened the engine speed increases and the negative pressure in the
venturi pipe grows. The same negative pressure is transferred to the upper side of the slide
membrane and pulls the throttle slide upwards.
At the same time the fuel flows from the float chamber through the main jet into the needle jet.
There it mixes with the air flowing in through the main air jet. The result is a fuel air mixture.
Negative pressure causes this fuel air mixture to flow through the space between the needle jet
and the jet needle into the venturi pipe. There it meets the main air flow sucked in by the
engine.
The precise amount of the mixture released is adjusted in the needle jet. The space through which
the mixture passes changes depending on the position of the throttle slide.
Throttle slide in top position: large space
Throttle slide in bottom position: small space
8-5E
AIR
FUEL AIR MIXTURE
FUEL
Содержание 400-660 LC4 1998-2005
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