Vintage Go-Kart, 34mm Alky Tillotson Carb, nice tight throttle shaft , this Carb i have ran on a open K-35, and a few open 100cc Rotary's , it has performed great... it has a machined filter cup .. two of the allen head screw's that hold the plates together have been upsized to metric , because of stripped holes in the carb body. everything tightens very well & work's great... "any questions please ask"