ESR535 is a high quality regulator/rectifier that has been specifically designed to replace the unreliable OEM part on several Triumph models. Our ESR535 incorporates a very efficient heat sink which keeps the temperature of the unit down. Internally we use only the best quality components for the power circuits. The result is a very high quality unit that is far superior to the OEM regulator. This regulator/rectifier controls output power accurately and provides for a stable charge rate of the battery across the whole RPM range. Like all regulator/rectifiers and stators manufactured by ElectroSport this unit also comes with a full one year warranty.