Idling or Slow Speed Circuit Used In Solex Carburetor

IDLING OR SLOW SPEED CIRCUIT :

At Idling, The throttle valve is almost closed. The engine suction is applied at the pilot jet. This jet gets petrol from the main jet circuit. The air is drawn from the pilot air jet and mixed with the petrol coming from pilot petrol jet. This mixture enters the cylinder through Idle port.

During the slow running period, the throttle valve is made to open slightly. The suction is also created at the slow speed openings. These slow speed openings are provided just above the throttle valve. Once the air and fuel start to flow through the slow speed opening, The mixture supply through the idle port is stopped.

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