Cycle Electric 3-Phase 50-Amp Charging Kit For Harley Dyna Features You will not find a more durable or longer lasting system than this state-of-the-art Cycle Electric alternator kit Delivers better low speed output and a smoother charge to the battery for crisper starting and longer battery life Kits produce 32 amps at 1000 RPM and 50 amps at 2500 RPM Improved durability and dependability than stock 48-amp system