ESR101 is a high quality regulator/rectifier that replaces the not-so-reliable OEM Suzuki part on your GS1100E (or GSX1100E). Power handling of our ESR101 is superior compared to the stock regulator, and ESR101 is designed to be a plug in replacement. We have incorporated a heat sink that gets rid of internal heat to the housing quickly and efficiently, making for a very reliable unit. This regulator/rectifier regulates all three phases coming from the stator, unlike the stock unit which only regulates 2 phases. 3-Phase regulation is a major step towards reliability on these Suzuki GS models. Like all regulator/rectifiers manufactured by ElectroSport ESR101 also comes with a full one year warranty.