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 47.00mm Piston is 46.97mm Compression ratio of 6.6 1 Made in Taiwan Fits 1983 Yamaha PW80 1984 Yamaha PW80 1985 Yamaha PW80 1986 Yamaha BW80 1986 Yamaha PW80 1987 Yamaha BW80 1987 Yamaha PW80 1988 Yamaha BW80 1988 Yamaha PW80 1989 Yamaha PW80 1990 Yamaha BW80 1990 Yamaha PW80 1991 Yamaha PW80 1992 Yamaha PW80 1993 Yamaha PW80 1994 Yamaha PW80 1995 Yamaha PW80 1996 Yamaha PW80 1997 Yamaha PW80 1998 Yamaha PW80 1999 Yamaha PW80 2000 Yamaha PW80 2001 Yamaha PW80 2002 Yamaha PW80 2003 Yamaha PW80 2004 Yamaha PW80 2005 Yamaha PW80 2006 Yamaha PW80