High Output Charging System & Rotor Harley Big Twin 1981-99 HD# 29957-81B

Weight: 4.54 Charging System The 32 Amp system features a series type regulator-rectifier that unloads the stator when the battery is at full charge letting the engine spin easier than the OEM shunt type which creates a constant drag. This not only extends the life of the charging system, it increases fuel mileage and frees up horsepower Rotor The rotor has been upgraded with an improved method of gluing the magnets to prevent them from coming off like the OEM rotors are known to do The rotor can be used as a replacement rotor for the OEM 22 Amp and 32 Amp charging system, but also works in conjunction with the Compu-Fire 32 Amp and 40 Amp charging systems Compu-Fire 22, 32 & 40 Amp Rotor Fits Big Twin 1981-1999 (except Twin Cam & FLT 1997-1998 with EFI) Replaces HD# 29957-81B