ESG785 is a very high quality stator that replaces the OEM stator in the Yamaha YFZ-R6 models between 2003 and 2005, as well as the YFZ-R6S models from 2004 through 2009.. ElectroSport manufactures the ESG785 stator using a high quality core and the highest grade copper wire for the windings. A slightly reconfigured winding configuration from stock and the high magnetic conductivity of the new stator core result in vastly improved efficiency compared to stock. Therefore our ESG785 stator offers a perfect output across the RPM range and it also runs much cooler than the stock stator, which drastically improves reliability. We install very high grade lead wires that feature heat and chafe resistant insulation and high quality rubber seals and insulation coatings making this stator a plug in replacement of the OEM unit. Like all stators manufactured by ElectroSport, this ESG785 also comes with a full one year warranty.