This ESR VR is a superior replacement regulator/rectifier for the unreliable Ducati Energica unit for ALL older models with bullet connectors (as shown). It's built using a high quality 4-diode rectifier bridge, and the latest generation voltage control circuit as well. OEM sized, it's built to plug-n-play and runs MUCH cooler than the stock unit. Connectors and leads are of the highest quality and are direct plug-ins to the stock harness (verify with yours prior to ordering). Gives a tightly controlled output voltage at all RPMs resulting in always having the optimum charge rate for the battery.