Harddrive Regulator - CHR Softail `2001-2006 OEM 74540-01 — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Softail (2001-2006)

Harddrive regulator for Softail models 2001-2006, engineered to meet or exceed OEM specifications for reliable charging system performance. Built with high-temperature SCR technology and sealed encapsulation to handle heat and environmental stress on V-twin engines.

Features

• Meets or exceeds OEM specifications
• High-power SCR (Silicon Controlled Rectifier) design
• Sealed, high-temperature encapsulation
• Surface-mount circuit board minimizes thermal impedance
• OEM-grade wiring harness

Specifications

• Brand: Harddrive
• Manufacturer Part #: H1001C
• UPC: 191361169915
• Dimensions: 5.4 in L × 5.6 in W × 3.2 in H
• Weight: 1.42 lbs
• Country of Origin: China (Mainland)

Fitment

Fits Harley-Davidson Softail models 2001 through 2006. OEM part number 74540-01.

Frequently Asked Questions

Will this fit my 2007+ Softail?

No — this regulator is specific to 2001-2006 Softail models. 2007 and newer Softails use a different regulator design.

Is this a direct bolt-in replacement?

Yes. Harddrive regulators mount directly to the stock location with included OEM-grade wiring harness.

What does the regulator do?

The regulator controls voltage output from the alternator to keep your battery charged and electrical system stable while riding.

Why is this regulator sealed?

Sealed encapsulation protects the SCR circuit board from heat, moisture, and dirt — extending service life on the road.

Is this better than stock Harley?

Harddrive meets or exceeds OEM specifications using modern SCR technology, which runs cooler and handles heat more efficiently than older designs.