ESR180 is a high quality regulator/rectifier that replaces the OEM regulator on several Honda two-cylinder models. ESR180 has been designed with a highly efficient heat sink and modern regulation circuits making for a very reliable unit. Output voltage is controlled tightly and this results in a perfect charge rate for your battery across the RPM range. Like all other regulator/rectifiers we manufacture, this ElectroSport ESR180 also comes with a full one year warranty.