Manufactured by Namura Kit includes piston, rings, pin, clips, wrist pin bearing top end gasket kit you get exactly what is pictured Cast piston has super-high silicone content for additional strength Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life Piston dome is anodized for superior heat resistance and longer lifespan Namura gaskets use performance materials to increase durability and provide greater reliability Includes all gaskets pictured to rebuild top end Kit is for standard bore size 66.40mm Size B piston is 66.35mm Made in Taiwan Fits 1986 Honda CR250R 1987 Honda CR250R 1988 Honda CR250R 1989 Honda CR250R 1990 Honda CR250R 1991 Honda CR250R