Compufire 40A 3 Phase Charging System - 40 AMP NON Vented `1999-2002 Twin CAM — Harley-Davidson (1999-2002)

Compufire 40A 3-phase charging system designed for 1999-2002 Twin Cam Harley-Davidson motorcycles. Produces 25 amp at idle, 40 amp above 2800 rpm, with a vented rotor that keeps the stator cooler for sustained high output.

Features

• 25 AMP output at idle, 40 AMP above 2800 rpm
• Vented rotor for improved heat dissipation
• High output voltage regulator at 14.25V from idle
• Works with OEM primary due to narrow rotor and stator profile
• Made in the USA

Specifications

• Brand: Compufire
• Manufacturer Part #: 55576
• UPC: 694342548100
• Length: 9 in
• Width: 8 in
• Height: 8 in
• Weight: 11 lbs

Fitment

Fits 1999-2002 Harley-Davidson Twin Cam Softail, Dyna, and FLT models with OEM primary.

Frequently Asked Questions

Will this fit my 2003+ Twin Cam?

No — this system is specific to 1999-2002 Twin Cam models. 2003 and newer Twin Cam bikes require a different charging system.

Does the vented rotor really keep the stator cooler?

Yes. The vented design allows better airflow around the stator windings, which helps maintain maximum output during sustained riding.

What's the output at idle versus highway speeds?

25 amp at idle, stepping up to 40 amp above 2800 rpm — enough for most stock and mild modified electrical systems.

Does this work with my OEM primary cover?

Yes. The narrow profile of the rotor and stator is designed to fit without modifying the OEM primary.