The kill switch works as it should. The wire is not cut.

O.E.M Part Number 1C3-83976-00-00

Make	Model	Year	Submodel
Yamaha	YZ125	2005	All
Yamaha	YZ125	2006	All
Yamaha	YZ125	2007	All
Yamaha	YZ125	2008	All
Yamaha	YZ125	2009	All
Yamaha	YZ125	2010	All
Yamaha	YZ125	2011	All
Yamaha	YZ125	2012	All
Yamaha	YZ125	2013	All
Yamaha	YZ125	2014	All
Yamaha	YZ125	2015	All
Yamaha	YZ125	2016	All
Yamaha	YZ125	2017	All
Yamaha	YZ125	2018	All
Yamaha	YZ250	2005	All
Yamaha	YZ250	2006	All
Yamaha	YZ250	2007	All
Yamaha	YZ250	2008	All
Yamaha	YZ250	2009	All
Yamaha	YZ250	2010	All
Yamaha	YZ250	2011	All
Yamaha	YZ250	2012	All
Yamaha	YZ250	2013	All
Yamaha	YZ250	2014	All
Yamaha	YZ250	2015	All
Yamaha	YZ250	2016	All
Yamaha	YZ250	2017	All
Yamaha	YZ250	2018	All
Yamaha	YZ250F	2005	All
Yamaha	YZ250F	2006	All
Yamaha	YZ250F	2007	All
Yamaha	YZ250F	2008	All
Yamaha	YZ250F	2009	All
Yamaha	YZ450F	2005	All
Yamaha	YZ450F	2006	All
Yamaha	YZ450F	2007	All
Yamaha	YZ450F	2008	All
Yamaha	YZ450F	2009	All