Blue O-Ring Chain 520-96L 2004 2005 2006 2007 2008 2009 Yamaha YFZ450 96L Blue O Ring Chain Race-Driven O Ring Chain's tensile strength = 8200+ lbs. All chains include masterlink. O-Ring Chain helps keep the pins lubricated which reduces friction and helps the chain last longer. Fits 2004-2009 Yamaha YFZ450