Manufactured by Kit includes connecting rod, bottom bearing crank pin Compatible with Yamaha models below: 2003 WR250F 2003 YZ250F 2004 WR250F 2004 YZ250F 2005 WR250F 2005 YZ250F 2006 WR250F 2006 YZ250F 2007 WR250F 2007 YZ250F 2008 WR250F 2008 YZ250F 2009 WR250F 2009 YZ250F 2010 WR250F 2010 YZ250F 2011 WR250F 2011 YZ250F 2012 WR250F 2012 YZ250F 2013 WR250F 2013 YZ250F Compatible with GAS GAS models below: 2010 EC250F 4-Stroke 2011 EC250F 4-Stroke 2012 EC250F 4-Stroke 2013 EC250F 4-Stroke 2014 EC250F 4-Stroke 2015 EC250F 4-Stroke