2000-2001 Yamaha YFM 400 Big Bear ATV Electric Rectifier / Regulator All Regulator / Rectifiers are New and Built to O.E.M. Specifications Includes 1 Year Manufacturer Warranty High Quality Cost Effective Factory Part Repalcement Includes O.E.M. Style Connector Compatibility: 2000-2001 Yamaha YFM 400 Big Bear