Harddrive Black Regulator - Harley Sportster 1978-1981
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.
Ensure your 1978-1981 Harley-Davidson Sportster runs flawlessly with this Harddrive black regulator. Engineered to meet or exceed OEM specifications, it provides consistent voltage regulation, vital for your battery's health and the reliable operation of your V-twin's entire electrical system.
Why riders pick this
- Engineered to meet or exceed OEM specifications
- High-power SCR technology for cooler operation
- Sealed, high-temperature encapsulation enhances durability
- Surface-mount circuit board for efficient heat dissipation
- Includes OEM-grade wiring harness for direct fit
An outdated or failing voltage regulator can lead to significant electrical problems, including battery drain and component failure. This Harddrive regulator for late 70s and early 80s Sportster models is built with high-power SCR technology and sealed encapsulation, designed to run cooler and handle heat stress more effectively than original equipment units.
Stable Electrical Performance
- Meets or exceeds original equipment manufacturer specifications
- High-power SCR (Silicon Controlled Rectifier) design for cooler operation
- Sealed, high-temperature encapsulation ensures maximum durability
- Surface-mount circuit board for efficient heat dissipation
- Equipped with an OEM-grade wiring harness for easy installation
Built for Classic Sportsters
For owners of classic Sportster models, maintaining electrical integrity is paramount. This Harddrive regulator offers a robust and reliable replacement, engineered to perform under demanding conditions. Its improved thermal management ensures a longer lifespan for your charging system, keeping your vintage V-twin on the road for years to come.
Specifications
- Brand: Harddrive
- Manufacturer Part #: H0478
- UPC: 191361170263
- Weight: 0.9342 lbs
- Country of Origin: China (Mainland)
Common questions
Will this fit my 1982 or newer Sportster?
No, this Harddrive regulator is specific to 1978-1981 Harley-Davidson XL Sportster models. Newer models use different charging system components.
What's the advantage over the stock regulator?
Harddrive's SCR design and sealed encapsulation allow for cooler operation and better heat handling than original equipment, contributing to improved longevity and reliability.
Is this a direct bolt-in replacement?
Yes, this regulator is designed as a direct bolt-in replacement, utilizing the same OEM wiring harness and mount points as the original unit for 1978-1981 XL Sportster models.
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 | 820-60148 |
| WEIGHT | 0.93 lb |
