Cylinder Works Big Bore Cylinder Kits set the standard when you want to increase the displacement of your motorcycle, UTV, or ATV. With this kit you get top quality parts rolled into one package so you’ll be able to directly fit every component, torque everything down, and get back to riding. The cylinder itself is made from an OEM grade aluminum casting with a nickel silicon carbide cylinder sleeve that comes precisely sized and honed, giving your engine great ring sealing and cylinder wall longevity.