Seller notes

CARB'S AIR_MIXTURE_SCREW ALL_TRX90 (217X) LOOK CLOSE I'M NOT SURE WHAT YEARS THIS WORKS FOR 1993 TO ??? The air screw adjusts the amount of air that passes over the opening of the slow jet, using vacuum to pull fuel up from the bowl. Since the throttle slide is almost completely closed at idle, the air screw and slow jet bypass the closed carb venturi and act as the baseline providers of fuel mixture for idle and low speed throttle response. You add a little fuel and air when you set the idle sc...

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