Harddrive Regulator - 1989-1999 OEM 74519-88a NON-EFI — Harley-Davidson (1989-1999)

Harddrive OEM-spec regulator for 1989-1999 Harley-Davidson V-twin motorcycles without electronic fuel injection. Built with high-temperature SCR (Silicon Controlled Rectifier) technology and sealed encapsulation to keep voltage steady and heat down during long rides.

Features

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

Specifications

• Brand: Harddrive
• Manufacturer Part #: H1988
• UPC: 191361170027
• Dimensions: 5.3 in L × 5.3 in W × 3.3 in H
• Weight: 0.88 lbs
• Country of Origin: China (Mainland)

Fitment

Fits 1989-1999 Harley-Davidson V-twin motorcycles with non-EFI (carburetor) engines. Replaces OEM part number 74519-88a.

Frequently Asked Questions

Will this fit my 1989-1999 Harley V-twin?

Yes — designed as a direct replacement for 1989-1999 non-EFI carbureted V-twin Harleys, using OEM part number 74519-88a.

Does this work on fuel-injected Harleys?

No — this regulator is for non-EFI (carbureted) models only. EFI bikes require a different part.

What does a regulator do?

It maintains steady voltage to your bike's charging system and electrical components, preventing overcharge and battery damage during riding.

How hot does it get?

The sealed encapsulation and SCR design keep operating temperature low compared to older regulators, improving reliability and lifespan.