ZSDTRP Hot Start Kit for FCR MX Carburetor, operated choke assembly compatible with model number 16019-MEB-671.Designed to fit all FCR MX flat slide carburetors including 28mm, 31mm, 35mm, 37mm, 39mm, and 41mm sizes.This kit functions as a cold or hot start valve component, aiding in easier engine starting under various temperature conditions.Package includes: 1 × Hot Start Set Fitment list: For CRF150RB 2018 For CRF150R 2018 For CRF450X 2017 For CRF250X 2017 For CRF150RB 2017 For CRF150R 2017 For CRF450X 2016 For CRF250X 2016 For CRF150RB 2016 For CRF150R 2016 For CRF450X 2015 For CRF250X 2015 For CRF150RB 2015 For CRF150R 2015 For CRF450X 2014 For CRF150RB 2014 For CRF150R 2014 For CRF450X 2013 For CRF250X 2013 For CRF150RB 2013 For CRF150R 2013 For CRF450X 2012 For CRF250X 2012 For CRF150RB 2012 For CRF150R 2012 For CRF450X 2009 For CRF250X 2009 For CRF250R 2009 For CRF150RB 2009 For CRF150R 2009 For CRF450X 2008 For CRF450R 2008 For CRF250X 2008 For CRF250R 2008 For CRF150RB 2008 For CRF150R 2008 For CRF450X 2007 For CRF450R 2007 For CRF250X 2007 For CRF250R 2007 For CRF150RB 2007 For CRF150R 2007 For CRF450X 2006 For CRF450R 2006 For CRF250X 2006 For CRF250R 2006 For CRF450X 2005 For CRF450R 2005 For CRF250X 2005 For CRF250R 2005 For CRF450R 2004 For CRF250X 2004 For CRF250R 2004 For CRF450R 2003 For CRF450R 2002