Harddrive Rear Master Cylinder Chrome - Harley-Davidson Electra Glide, Super Glide, Low Rider
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.
Restore confident braking to your classic V-twin with this Harddrive Chrome Rear Master Cylinder. Engineered as a direct replacement, it mounts in the stock location and meets OEM specifications for dependable performance. This unit is built for riders who demand reliable stopping power without compromising the factory look.
Why riders pick this
- Direct OEM replacement for FX/FL V-twin models
- Brilliant chrome plated finish
- Mounts in the stock location
- Restores reliable braking performance
- Built to original equipment specifications
When you're running a classic Harley-Davidson FL or FX, every component needs to be up to the task, especially your brakes. The Harddrive Chrome Rear Master Cylinder is designed to bring back that factory-fresh stopping power, ensuring your ride is as safe as it is stylish. This isn't just a generic part; it's an OEM-spec replacement that fits precisely where your old master cylinder came off.
Reliable Braking Performance
- Direct OEM replacement for seamless integration
- Chrome plated finish for a classic V-twin aesthetic
- Mounts in the stock location without modifications
- Engineered to meet original equipment specifications
Easy Installation for Classic V-Twins
This master cylinder is a straightforward swap for your worn-out original, making it an ideal choice for garage builders and professional shops alike. It's designed to bolt right into the factory mounting points, simplifying the installation process. Pair this with fresh brake fluid and a proper bleed for a complete refresh of your rear braking system, giving you peace of mind on every ride.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 30-844
- UPC: 191361128325
- Length: 7.79 in
- Width: 7.12 in
- Height: 1.85 in
- Weight: 1.8959 lbs
- Country of Origin: China (Taiwan)
Common questions
Is this master cylinder a direct replacement for my older Harley FX/FL?
Yes, this Harddrive master cylinder is designed as a direct replacement for 1979 and earlier Harley-Davidson FX and FL V-twin models. It mounts in the stock location and meets OEM specifications. Please verify the OE# 41761-78 matches your current master cylinder before ordering.
Do I need to bleed my brakes after installing this master cylinder?
Absolutely. Whenever you replace a master cylinder, you introduce air into the brake lines. A thorough bleeding procedure is essential to ensure proper brake function and a firm pedal feel.
Will this master cylinder work with aftermarket brake lines?
This master cylinder is designed to function with OEM-spec brake lines. If you have aftermarket lines that match the factory specifications for your model, they should be compatible. Always inspect all brake components for wear before reassembly.
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 | Brakes |
| SKU | 820-51812 |
| WEIGHT | 1.9 lb |
