Ricks Motorsport Electrics offers 2 and 4 brush replacement sets for Mitsuba and Nippon Denso starter motors. You will need to solder or spot weld these brush sets onto your plate.
Fitment:
2003 Yamaha WR250F
2003 Yamaha WR450F
2004 Yamaha WR250F
2004 Yamaha WR450F
2005 Yamaha WR250F
2005 Yamaha WR450F
2006 Yamaha WR250F
2006 Yamaha WR450F
2007 Aprilia RXV450
2007 Aprilia RXV550
2007 Aprilia SXV 450
2007 Aprilia SXV 550
2007 Yamaha WR250F
2007 Yamaha WR450F
2008 Aprilia RXV450
2008 Aprilia RXV550
2008 Aprilia SXV 450
2008 Aprilia SXV 550
2008 Yamaha WR250F
2008 Yamaha WR450F
2009 Aprilia RXV450
2009 Aprilia RXV550
2009 Aprilia SXV 550
2009 Yamaha WR250F
2009 Yamaha WR450F
2010 Yamaha WR250F
2010 Yamaha WR450F
2011 Yamaha WR250F
2011 Yamaha WR450F
2012 Yamaha WR250F
2012 Yamaha WR450F
2013 Yamaha WR450F
2014 Yamaha WR450F