Harley Davidson Voltage Regulator / Rectifier – Big Twin 1976–1980 Black, OEM 74512-79A

These voltage regulators/rectifiers are designed for dependable charging performance on classic Harley-Davidson Big Twin models. Built with improved solid-state circuitry and high-performance components, these units deliver consistent voltage regulation and long-term reliability on vintage charging systems.

All semi-conductors are USA made, ensuring quality and durability where it matters most. Finished in a black anodized coating and rated at 17.8 amps, this regulator/rectifier is a clean, factory-style replacement when servicing or upgrading older Big Twin electrical systems.

Replaces Harley-Davidson OEM 74512-79A, making it a straightforward solution for maintaining proper charging performance on late-’70s Big Twin motorcycles.

Fitment

Harley-Davidson Big Twin models 1976–1980

Replaces Harley-Davidson OEM 74512-79A