Operation Of Carburetor Jets - KYMCO GRAND DINK 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
-------------------- Low Speed Small Jet Holes
2.MIDDLE SPEED
Venturi (halfway opened throttle valve)
Air
High Speed Air Jet
Fuel in Float Chamber
Main Jet (The slow jet also works.)
Low & Middle Speed Supplementary Device:
Pilot Screw
Low & Middle Speed Supplementary Fuel Inlets
13-3
Slow Jet
Main Jet
Vacuum Tube
ACV
Slow Jet
Bypass Jet
GRAND DINK 250
Air Bleed Holes
Air Bleed Holes
Low Speed Air Jet
Vacuum Diaphragm
Throttle
Valve
Main Jet
Mixture.......
Mixture.......
Air