Harddrive Black Regulator - Harley Sportster 1991
About Harddrive
Harddrive is the house performance and replacement line built for American V-twins, covering everything from engine hardware and electrical to controls, lighting and chassis parts. The range is aimed squarely at Harley-Davidson and Indian riders who want a direct-fit part without dealer pricing, and it spans decades of model years — from Evolution-era Softails to current Milwaukee-Eight baggers.
Maintain peak electrical performance on your 1991 Harley-Davidson Sportster with this Harddrive black regulator. Engineered to OEM specifications, it provides consistent voltage control, crucial for your battery's health and the reliable function of all your bike's electronics. Upgrade for peace of mind on every ride.
Why riders pick this
- Engineered to meet or exceed OEM specifications
- SCR design for cooler and more stable operation
- Sealed, high-temperature encapsulation protects internals
- High-temperature circuit board for efficient heat dissipation
- Includes an OEM-grade wiring harness for direct fit
A properly functioning voltage regulator is vital for preventing overcharging and potential damage to your battery and other critical electrical components. This Harddrive regulator integrates advanced thermal management to ensure your charging system remains stable, even under heavy load or in hot conditions.
Optimized Charging Performance
- Meets or exceeds original equipment manufacturer specifications
- Silicon Controlled Rectifier (SCR) design promotes cooler operation
- Sealed, high-temperature encapsulation for enhanced durability
- High-temperature circuit board efficiently dissipates heat
- Comes with an OEM-grade wiring harness for easy installation
Built for Longevity
Riders know that electrical reliability is paramount, especially on older models. This Harddrive regulator offers a robust solution for 1991 Sportster owners looking for an upgrade that delivers consistent performance and improved longevity over standard units. Its design focuses on efficient heat management, a key factor in regulator lifespan.
Specifications
- Brand: Harddrive
- Manufacturer Part #: H2391
- UPC: 191361170201
- Weight: 1.3637 lbs
- Country of Origin: China (Mainland)
Common questions
What does a regulator do on a motorcycle?
The regulator controls the charging voltage from the alternator, preventing overcharging and battery damage while effectively managing heat buildup during operation.
Is this an OEM-equivalent part for my 1991 Sportster?
Yes, this Harddrive regulator is engineered to meet or exceed original equipment specifications for your 1991 Harley-Davidson Sportster, ensuring a compatible and reliable replacement.
Will this regulator improve my bike's electrical reliability?
The high-power SCR technology and sealed design are specifically engineered to run cooler and more reliably than many stock units, contributing to overall electrical system longevity.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Harddrive |
| TYPE | Electrical |
| SKU | 820-60142 |
| WEIGHT | 1.36 lb |
