OEM replacement Steel Front and Rear Sprocket and Yellow Non O Ring Chain. OEM replacement Steel Front and Rear Sprocket and Yellow Non O Ring Chain. Fits 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Yamaha YZ250, 1999 2000 2001 Yamaha WR400F, 1999 Yamaha YZ400F.
