Wiseco’s bottom-end rebuild kits help save time and money for your dirt bike, ATV, or UTV bottom-end rebuild. Available for many popular applications, these kits contain a crankshaft assembly, main bearings, and a bottom-end gasket kit, all in one box under one part number. Each kit contains everything you need to complete your rebuild the right way, the first time - crankshaft and connecting rod, all applicable bearings, and complete bottom end gasket kit made to meet or exceed O.E.M. quality. Wiseco connecting rods are double forged from a dedicated forging and feature shot peening, oil slots, and coated bronze thrust washers. Bottom end gasket kits are made from premium materials, exceeding O.E.M. standards, to provide exceptional seal between critical mating surfaces. Main bearings are manufactured to the highest quality standards; each is case hardened for maximum life and smooth operation at high RPM's.