Fits the following models: 2002 CRF450R A - CAM CHAIN / TENSIONER 2003 CRF450R A - CAM CHAIN / TENSIONER 2004 CRF450R A - CAM CHAIN / TENSIONER 2004 CRF450R A/A - CAM CHAIN / TENSIONER 2005 CRF450R A - CAM CHAIN / TENSIONER 2005 CRF450R A/A - CAM CHAIN / TENSIONER 2005 CRF450R A/B - CAM CHAIN / TENSIONER 2005 CRF450X A - CAM CHAIN / TENSIONER 2005 CRF450X AC - CAM CHAIN / TENSIONER 2006 CRF450R A - CAM CHAIN / TENSIONER 2006 CRF450R A/A - CAM CHAIN / TENSIONER 2006 CRF450X A - CAM CHAIN / TENSIONER 2006 CRF450X AC - CAM CHAIN / TENSIONER 2006 TRX450ER A - CAM CHAIN / TENSIONER 2006 TRX450R A - CAM CHAIN / TENSIONER 2007 CRF450R A - CAM CHAIN / TENSIONER 2007 CRF450R A/A - CAM CHAIN / TENSIONER 2007 CRF450X A - CAM CHAIN / TENSIONER 2007 TRX450ER 3A - CAM CHAIN / TENSIONER 2007 TRX450ER A - CAM CHAIN / TENSIONER 2007 TRX450R 3A - CAM CHAIN / TENSIONER 2007 TRX450R A - CAM CHAIN / TENSIONER 2008 CRF450R 2A - CAM CHAIN / TENSIONER 2008 CRF450R 2A/A - CAM CHAIN / TENSIONER 2008 CRF450R A - CAM CHAIN / TENSIONER 2008 CRF450R A/A - CAM CHAIN / TENSIONER 2008 CRF450X A - CAM CHAIN / TENSIONER 2008 TRX450ER 3A - CAM CHAIN / TENSIONER 2008 TRX450ER A - CAM CHAIN / TENSIONER 2008 TRX450R 3A - CAM CHAIN / TENSIONER 2008 TRX450R A - CAM CHAIN / TENSIONER 2009 CRF450X A - CAM CHAIN / TENSIONER 2009 TRX450ER 3A - CAM CHAIN / TENSIONER 2009 TRX450ER A - CAM CHAIN / TENSIONER 2009 TRX450R 3A - CAM CHAIN / TENSIONER 2009 TRX450R A - CAM CHAIN / TENSIONER 2012 CRF450X AC - CAM CHAIN / TENSIONER 2012 TRX450ER 3A - CAM CHAIN / TENSIONER 2013 CRF450X AC - CAM CHAIN / TENSIONER 2013 TRX450ER 3AC - CAM CHAIN / TENSIONER 2013 TRX450ER AC - CAM CHAIN / TENSIONER 2014 CRF450X AC - CAM CHAIN / TENSIONER 2014 TRX450ER 3AC - CAM CHAIN / TENSIONER 2014 TRX450ER AC - CAM CHAIN / TENSIONER 2015 CRF450X AC - CAM CHAIN / TENSIONER 2016 CRF450X AC - CAM CHAIN / TENSIONER 2017 CRF450X AC - CAM CHAIN / TENSIONER