125 where is the throttle valve of motorcycle carburetor closed?

125 motorcycle carburetor throttle valve closed to the end. The inquiry information shows that 125 motorcycle carburetor uses a cable to control the throttle, and the throttle is equipped with an oil needle. When idling, the throttle valve is closed at the bottom, the gasoline is provided by the idling hole, and the air is provided by the mixer screw to make a mixture of 14.7: 1 to keep the idling stable.