ESG790 is a very high quality stator that replaces the OEM stator in the Yamaha YFZ1000R1 models for 1998 and the YFZ-R1 models between 1999 and 2001. ElectroSport manufactures the ESG790 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. With this our ESG790 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 ESG790 also comes with a full one year warranty.