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Regulators for Shovelhead and Evolution Big Twin
Shop Electrical Alternators and Corresponding Regulators
Regulators for Shovelhead and Evolution Big Twin

Regulators for Shovelhead and Evolution Big Twin

Cycle Electric Regulators for Shovelhead and Evolution
Cycle Electric Regulators for Shovelhead and Evolution
Cycle Electric regulators are built to last. Their rugged design is capable of handling overloads and continuous operation. Top quality materials and assembly processes that meet stringent military-quality standards ensure a low failure rate and a long service life.
These rectifying regulators control voltage by allowing the alternator to generate only the precise amount of energy needed to supply all electrical loads — such as battery charging, lighting, ignition, and stereo systems — while blocking excess current. This reduces stator current, lowers operating temperature, and decreases drag on the motor for more efficient operation. The result is a smoother, more consistent battery charge, which means less battery maintenance and a longer service life.
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Standard Regulators for Shovelhead and Evolution
Standard Regulators for Shovelhead and Evolution
These affordable volt packs provide a solid solution for voltage regulation in older Harley-Davidson charging systems. They operate on the classic principle of diverting excess energy to reliably supply the battery and electrical components.
The design is proven and has been in use for years, making them particularly suitable for daily bikes, custom builds, or simple replacement solutions. Some models are also available in chrome to visually complement custom projects.
In short: functional technology without unnecessary complexity – ideal when reliability and good value for money are the priorities.
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Voltpack Brackets for Big Twin
Voltpack Brackets for Big Twin
Stock replacement brackets for solid-state regulators on FLH, FX and Softail models →1999.
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The GasBox Voltpack Brackets for Big Twin
The GasBox Voltpack Brackets for Big Twin
Heavy Duty, quality built regulator bracket which allows you to simply and cleanly mount your voltage regulator to the front motor mount bolts of your Big Twin Harley.
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Regulators for AC alternators of Shovelhead and Evolution motors.

The regulators all have a standardized housing with identical mounting hole spacing. The external differences lie in the wire connections, especially in the plugs of the two connecting wires to the alternator winding. Because the windings - read: stators - are interchangeable and not all Harleys are original after 30 years or longer, we strongly recommend to compare the connector plugs in addition to the year of manufacture before buying the regulator. Drawings of the connectors can be found with all regulators.

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