Type Carburetor based Construction

Based on the construction, engine carburetor on the bike can be divided into three, namely:
1 Venturi Carburetor with Fixed (Fixed Venturi).
This type of carburetor is a carburetor venturi diameter can not be changed-fox again. The amount of air flow is dependent on changes thorttle butterfly (gas valve). In this type, there is usually a pilot jet for idle speed / idling, the main secondary system speed to meet the fuel-air mixing process right at any speed.

There is also a system to anticipate acceleration in the gas when the engine suddenly. All auxiliary systems are intended to be more responsive engine because the throttle valve has limitations in forming a venturi effect.

2 Venturi Carburetor with Changing (Variable Venturi).
Venturi carburetor with changeable put the throttle valve / throttle piston (skepticism) is in the venturi and operated directly by wire gas. Therefore, the diameter of the venturi can be distinguished (varies) appropriate amount of air-fuel mixture flow trap in the carburetor.
This type carburetor in the fuel channel only through the main jet (main nozzle) which is controlled by the needle (needle skepticism), because the shape is designed tapered needle. This will reduce the jet (nozzle) and other additional channels as well as on fixed venturi carburetor.

3 Carburetor with Constant Speed ​​(Constant Velocity carburettor).
This type of carburetor is a combination of the two carburetors on top, which is equipped with a variable venturi gas valve (throttle butterfly valve). Often also referred to as CV carburetor (Constant Velocity carburettor). Piston valves are in functioning order diamerter venturi venturi varies with the piston moves up and down. The movement of the piston valve is not by wire gas as the variable venturi carburetor, but by a negative pressure (vacuum) in the venturi.

Based, fig 6.7 above, the air has a pressure equal to the outside air to fill the area under diapragma (3). The air entered the vacuum chamber through a hole (2) on the bottom of skepticism. Low pressure generated in a vacuum chamber and skepticism began to rise due to the gas valve (3) is opened by the gas cable. Protects spring (4) in helping to maintain skepticism skepticism are in a balanced position.
When the gas valve is opened fully, the speed of air passing through the venturi increases. This will result in the pressure in the vacuum chamber is lower again, so full of skepticism raised.