521cc 72mm 64mm CPI cylinder. Super Cub cool head with domes.41mm Keihin Pro Series carbs. Case machining is required for this kit to work. This is a bolt on kit with no machining required. It uses pump or race gas. We strongly recommend that this motor be built by a qualified mechanic with experience working on these types of motors. The item "Banshee 72 mil 521 cc 10mm Super Cub Cylinder Wiseco Big Bore Stroker Kit" is in sale since Wednesday, November 15, 2017. This item is in the category "eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Components". The seller is "bpracingatv" and is located in Upland, California. This item can be shipped worldwide.