Description:

Replace Part Number: 4KB-83973-21-00 4KB-83973-20-00 4KB-83973-00-00. the run, on off kill switch, and the button for the starter. Ready to install on a 2006 or 2007 or 2008 or 2009 YFZ450, 06 or 07, 08, or 09 YFZ 450. - carb models only, will NOT fit the yfz450r or yfz450x. Easy to install, it's better to be installed by professionals(NO instructions included).