Manufactured by Namura Kit includes piston, rings, pin, clips 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 Kit is for standard bore size 83.00mm Piston is 82.95mm 9.2 1 Standard compression ratio Made in Taiwan Fits 1987 Yamaha Warrior 350 YFM350X 1988 Yamaha Warrior 350 YFM350X 1989 Yamaha Warrior 350 YFM350X 1990 Yamaha Warrior 350 YFM350X 1991 Yamaha Warrior 350 YFM350X 1992 Yamaha Warrior 350 YFM350X 1993 Yamaha Warrior 350 YFM350X 1994 Yamaha Warrior 350 YFM350X 1995 Yamaha Warrior 350 YFM350X 1996 Yamaha Warrior 350 YFM350X 1997 Yamaha Warrior 350 YFM350X 1998 Yamaha Warrior 350 YFM350X 1999 Yamaha Warrior 350 YFM350X 2000 Yamaha Warrior 350 YFM350X 2001 Yamaha Warrior 350 YFM350X 2002 Yamaha Warrior 350 YFM350X 2003 Yamaha Warrior 350 YFM350X 2004 Yamaha Warrior 350 YFM350X