These main and slow jets are available to dealers in an assortment box, containing a total of 140 pieces commonly used main and slow jets, 10 pieces of every size as indicated in the table below. All of these and even more sizes are available in 5-packs. Jets are exactly made to OEM specifications, and are indelibly marked with their size. Note that low speed jets (also known as pilot jet) for Keihin Butterfly and CV carburetors look very much the same but are NOT interchangeable. Butterfly pilot jets have 0.6mm bore bleed holes, whereas those for CV carbs have 0.8mm bore bleed holes. These jets fit all Keihin CV (Constant Vacuum) carburetor equipped Buell 1988-2006, Sportster 1988-2006, Evolution Big Twin 1990-1999 and Twin Cam 1999-2006.