ESG479 is a high quality stator that replaces the OEM stator in the Yamaha YFM400 Big Bear models between 2000 and 2011. Our ESG479 is manufactured using a modern stator core and we install the highest grade copper wire using our state-of-the-art winding machines. The low magnetic losses inside the special core and the winding configuration we chose result in a highly efficient stator that runs cooler as well! We install the highest quality lead wires that offer abrasion resistant insulation while being very heat tolerant. We add a high quality pulser coil, quality rubber seals, insulation coatings and connectors to make this ESG479 a plug in replacement. ESG479 offers superior performance and reliability compared to the OEM stator. Like all stators manufactured by ElectroSport this ESG479 also comes with a full one year warranty.