Operation Of Carburetor Jets - KYMCO Bet & Win 250 Manual

13
. FUEL SYSTEM/CARBURETOR/
FUEL PUMP/ FUEL TANK

OPERATION OF CARBURETOR JETS

1. LOW SPEED
Venturi (slightly opened throttle valve)
Air
※
Low Speed Air Inlet
Fuel in Float Chamber‡ Slow Jet
※
-------------------- Low Speed Small Jet Holes
2.MIDDLE SPEED
Venturi (halfway opened throttle valve)
Air
※
High Speed Air Jet
Fuel in Float Chamber‡ Main Jet
※
Main Jet (The slow jet also works.)
Low & Middle Speed Supplementary Device:
Pilot Screw
Low & Middle Speed Supplementary Fuel Inlets
13-3
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Vacuum Tube
ACV
Slow Jet
Bypass Jet
Bet & Win 250
Air Bleed Holes‡ Mixture.......
Air Bleed Holes‡ Mixture.......
Low Speed Air Jet
Vacuum Diaphragm
Throttle
Valve
Main Jet
Air