723736 Fits Keihin Cv Carburetors Satin Aluminum Anodized

This Thunderjet kit from Zipper’s Performance is an essential tuning component for Harley-Davidson motorcycles running S&S, Bendix, or Keihin carburettors. It functions as a third fuel circuit, providing a dedicated path for fuel delivery that addresses the common flat spots found in the midrange and top-end power bands. The system includes an integrated air correction feature to maintain optimal performance regardless of changes in weather or elevation. By adding this circuit, tuners can achieve a more precise fuel curve that standard two-circuit carburettors cannot provide. It is particularly effective for modified engines where consistent fuel flow is critical. Installation on S&S Super E and G carburettors necessitates a complete rejetting to balance the new fuel delivery.