The Yamaha Raptor 700 Grizzly Rhino ProX Racing Piston Kit with Standard Bore 01.2706.A is a high-quality aftermarket part designed for 4-stroke engines. This piston kit, manufactured by Pro-X in the United States, includes a wrist pin and piston rings, making it a convenient and essential addition to your engine. With a piston diameter of 101.94 mm, this kit is specifically designed to ensure optimal performance and durability for your Yamaha ATV.