Colton, the bottom line is the float you have shown in the image you attached above is the correct one for the YF964s. It is however badly out of adjustment and will not work until that is corrected. With the air horn inverted and no gasket in place, the float needs to sit 9/32" from the carb body. Then turn the air horn over and let the float hang free. Adjust so that it drops 1 and 1/4 inches (at the outward end). Reverse the shaft holding the float in place. You do not want to allow it to work its way back into the carburetor. That will let your float hang free, your needle will fall out and absolutely nothing will work then. The little retaining clip should be on the opposite side from what is shown in the image above. Good luck.
