The Pro X 01.2281.025 Prox Piston Kit is a high-quality engine part designed for 2-stroke ATVs like the YFS200 Blaster. Made in Japan, this piston kit features a piston diameter of 66.25mm and comes with a weight of 1 lb. The Pro-X brand ensures reliability and performance, making this product a great choice for those looking to upgrade or repair their ATV engine. Came from a store close out. Sold as is and as seen. See pictures.