232051 Fits S S Super B D E and G Series Bendix Zenith and Keihin B

This Zipper’s Thunderjet kit features a patented third fuel circuit designed to eliminate midrange flat spots and lean conditions at high RPMs. Constructed with a built-in air correction system, it maintains consistent performance across varying altitudes and atmospheric conditions. The kit is compatible with S&S Super B, D, E, and G models, as well as Bendix, Zenith, and Keihin carburetors. By providing a precise fuel delivery path beyond the standard main and intermediate jets, the Thunderjet allows for finer tuning and improved throttle response. It is an essential modification for optimizing the fuel mixture on Harley-Davidson intake systems, ensuring the engine remains properly fueled throughout the entire powerband.