ESR531 is a high quality regulator/rectifier developed for the Honda VFR800 models using the latest insights in regulator/rectifier design. It is built around a very efficient heat sink that dissipates the generated heat quickly. All components in the power circuit are of the highest quality and we incorporated the latest regulator technology to make this regulator/rectifier the best you can buy. Like all regulator/rectifiers that are manufactured by ElectroSport this ESR531 regulator/rectifier also comes with a full one year warranty