ESR688 is a high quality regulator/rectifier that replaces the OEM regulator on Suzuki VZR1800 models from 2006 onwards. Our ESR688 offers superior performance by utilizing our latest generation of power circuit which is installed in a highly efficient heat sink. ESR688 offers a super stable battery voltage across the RPM range and will run much cooler than the OEM unit due to the improved heat sink design. All in all: a large improvement over the stock unit. ElectroSport supplies ESR688 with a full one year warranty.