Product Description This is a brand new Regulator Rectifier VoltageFit Models: YamahaBear Tracker 250 YFM250X(2001-2004)Big Bear 250YFM250B(2007-2008)Big Bear 400 YFM400(2002-2008)Bruin 250 YFM250B(2005-2006)Bruin 350 YFM350(2004-2006)