VENTO MOTORCYCLES
Rev no.01/ page 52of 84
CARBURETOR CIRCUITS
1. FUEL INTAKE CIRCUIT:
From fuel tank fuel comes
into float chamber of carburetor
by gravity feed. Separate vent is
provided at LH side of
carburetor body to maintain
inside atmospheric pressure.
When fuel starts filling the float
chamber, float rises up words
along with the float pin and after
a certain level it stops further
flow of fuel. Adjust float height
12
1
/
2
±1mm.
This avoids overflow of
Carburetor.
2. CHOKE CIRCUIT:
Choke is provided for easy starting,
since it requires rich mixture. Hence
choke knob is being operated from
the carburetor. Due to this an air
stopper (Butterfly valve) comes on
the way to the venturi (Air filter side)
of the carburetor, thus reducing the
amount of air being mixed with fuel.
Excessive fuel is being sucked from
the slow jet and less quantity of air
enters from the choke valve and
from the small opening below the
throttle valve.
When the motorcycle engine starts,
a spring loaded window is provided
in the choke actuating lever itself so
as provide in the choke actuating
knob itself so as provide extra air as
required to run the engine in rich
mixture.
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