Manufactured by Namura Kit includes piston, rings, pin, clips, 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 83.00mm Piston is 82.95mm 9.2 1 Standard compression ratio Made in Taiwan Fits 1987 Yamaha Moto-4 350 YFM350ER 1988 Yamaha Moto-4 350 YFM350ER 1989 Yamaha Moto-4 350 YFM350ER 1990 Yamaha Moto-4 350 YFM350ER 1992 Yamaha Moto-4 350 YFM350ER 1993 Yamaha Moto-4 350 YFM350ER 1994 Yamaha Moto-4 350 YFM350ER 1995 Yamaha Moto-4 350 YFM350ER