Abstract: An adaptor for a conventional type carburetor having a main support plate provided with central apertures therein, a slotted throttle plate movable longitudinally in the apertures, support and retaining plates on either side of said movable throttle plate slidable therebetween, and pivotable lever means attachable to the conventional throttle linkage for actuation of the slotted throttle plate to increase or decrease the flow of partially atomized gasoline and air through the slotted apertures of the aforementioned plates and to further break down and additionally atomize the gasoline particles due to the action of the cutting edges. This adaptor may be used with conventional carburetors and/or used as the primary throttle control for new carburetion systems.