The circuit of Suzuki GSX1300 Hayabusa Charging System composed of generator, regulator/rectifier unit and battery. The AC current generated from the generator is rectified by the rectifier and is turned into DC current, then it charges the battery. While the engine rpm is low and the generated voltage of generator is lower then the adjusted voltage of regulator, the regulator does not function. However, the generated current charges the battery directly at this time.