ESR181 is a high quality regulator/rectifier that replaces the OEM regulator on the Honda CMX250 Rebel models between 1985 and 2009. ESR181 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 ESR181 regulator also comes with a full one year warranty.