Harddrive Regulator - Black XL `91 OEM 74523-91 — Harley-Davidson Sportster 1200, Sportster 883, Sportster 883 Deluxe (1991)

Harddrive regulator in black for V-twin motorcycles, engineered to OEM specifications with sealed SCR (Silicon Controlled Rectifier) technology and high-temperature circuit board design. Manages charging system voltage and heat dissipation for reliable electrical performance.

Features

• Meets or exceeds OEM specifications
• Silicon Controlled Rectifier (SCR) design for cooler operation
• Sealed, high-temperature encapsulation
• High-temperature circuit board for efficient heat dissipation
• OEM-grade wiring harness

Specifications

• Brand: Harddrive
• Manufacturer Part #: H2391
• UPC: 191361170201
• Weight: 1.3637 lbs
• Country of Origin: China (Mainland)

Fitment

Fits V-twin motorcycles, including Harley-Davidson and Indian Motorcycle models with OEM regulator mounts.

Frequently Asked Questions

What does a regulator do on a motorcycle?

The regulator controls charging voltage from the alternator to prevent overcharging and battery damage, while managing heat buildup during operation.

Is this an OEM-equivalent part?

Yes — Harddrive regulators meet or exceed original equipment specifications for V-twin engines.

Will this fit my specific Harley or Indian model?

This regulator fits most V-twin motorcycles with standard OEM regulator mounts. Verify your bike's mounting location and connector type before ordering.

What makes the SCR design better?

The Silicon Controlled Rectifier allows cooler operation compared with older designs, reducing heat stress on the electrical system.

Is installation difficult?

Installation typically involves unplugging the old regulator and bolting in the new one with the included wiring harness — a straightforward swap for most riders.