520-76L O-Ring Chain and Sprocket 13/36 for 1998-2009 Polaris Scrambler 500 4X4 13 Tooth Front Sprocket, 36 Tooth Rear Sprocket and 520-76L Gold O-Ring Chain All Race-Driven sprockets meet or exceed OEM specifications and use hardened S45C steel. O-Ring Chain helps keep the pins lubricated which reduces friction and helps the chain last longer. Fits 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Polaris Scrambler 500 4x4