The Yamaha AT-2 AT2 AT- 3 HAP JONES Piston Kit Complete .0.50 oversized NOS 1972-73 is a vintage part designed for dual sport motorcycles with a 2-stroke engine. Made of aluminum, this piston kit features a piston diameter of 56.50 O.S., with the cylinder bore diameter matching at 56.50 mm. The kit includes a piston, rings, pin, and clips, providing a complete solution for motorcycle restoration projects. With its origin in Japan and no manufacturer warranty this piston kit is a reliable choice for Yamaha enthusiasts looking to replace worn-out components.