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 .040 over bore size 84.00mm Piston is 83.95mm Made in Taiwan Fits 1993 Yamaha Kodiak 400 4x4 YFM400FW 1994 Yamaha Kodiak 400 4x4 YFM400FW 1995 Yamaha Kodiak 400 4x4 YFM400FW 1996 Yamaha Kodiak 400 4x4 YFM400FW 1997 Yamaha Kodiak 400 4x4 YFM400FW 1998 Yamaha Kodiak 400 4x4 YFM400FW 1999 Yamaha Kodiak 400 4x4 YFM400FW 2000 Yamaha Big Bear 400 2x4 YFM400 2000 Yamaha Big Bear 400 4x4 YFM400F 2001 Yamaha Big Bear 400 2x4 YFM400 2001 Yamaha Big Bear 400 4x4 YFM400F 2002 Yamaha Big Bear 400 2x4 YFM400 2002 Yamaha Big Bear 400 4x4 YFM400F 2003 Yamaha Big Bear 400 2x4 YFM400 2003 Yamaha Big Bear 400 4x4 YFM400F 2004 Yamaha Big Bear 400 2x4 YFM400 2004 Yamaha Big Bear 400 4x4 YFM400F 2005 Yamaha Big Bear 400 4x4 YFM400F 2006 Yamaha Big Bear 400 4x4 YFM400F 2007 Yamaha Big Bear 400 4x4 IRS YFM400FB 2008 Yamaha Big Bear 400 4x4 IRS YFM400FB 2009 Yamaha Big Bear 400 4x4 IRS YFM400FB 2010 Yamaha Big Bear 400 4x4 IRS YFM400FB 2011 Yamaha Big Bear 400 4x4 IRS YFM400FB 2012 Yamaha Big Bear 400 4x4 IRS YFM400FB