We have a range of quality bigbore 4 stroke kits  Currently cylinder bores require re-plating after the cylinder becomes worn or damaged. The process of plating can be an inconvenience due to ‘down time’ for this process to be completed. these kits eliminate these hassles by providing a ready-to-install cylinder barrel. Cylinder Works and Vertex cylinder barrels look virtually identical to the OEM and are Nickel Silicon Carbide plated for long life and honed to exact size for easy piston installation our range also includes Pistons, Ring Sets and Gaskets for the Big Bore Kits if you dont see what you need let us know