HARLEY Sifton Shorty Hyper-Jet Kit Fits 0- Custom, application for OKO and S+S 1-7/8 "E" type carbu

Sifton brass carburetor hyper-jet kit increases fuel delivery and is for use on OKO and S+S 1-7/8 inch carburetors. Includes extra jets. Externally mounted 3rd fuel feed improves the performance of 2 circuit carburetors such as the S&S Super. Unmodified these carburetors typically have a low speed or intermediate circuit that supplies fuel from idle to approximately 2500 rpm at which point the carburetor's main jet circuit becomes active delivering more fuel to the engine. These 2 circuits must then supply fuel for the rest of the rpm range. The problem is: the remaining rpm range is too wide (typically 2500-6500 rpm) for only 2 circuits to handle efficiently. The tuner genearlly encounters problems jetting the carburetor to give good crisp mid-range response and still have strong top end power. This is an additional high speed fuel circuit delivering needed fuel to the engine at higher rpms 4500 & up. You can now use the main jet to tune for smooth broad mid-range power and supplement the top end with Sifton. Jets are used to control the amount of fuel sent to the engine. FITS HARLEY: 0- Custom, application for OKO and S+S 1-7/8 "E" type carburetors"