Harddrive Rear Master Cylinder 5/8" Bore Chrome - Harley FL Softail, XL Sportster
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.
This Harddrive Chrome Rear Master Cylinder with a 5/8-inch bore is engineered for direct replacement on specific FL Softail and XL Sportster models. Crafted from chrome-plated steel, it's built to meet OEM specifications for brake system pressure and fluid capacity. Restore precise and reliable braking to your V-twin.
Why riders pick this
- Chrome-plated steel construction
- 5/8" bore for precise braking
- Direct fit for stock mounting
- Meets OEM pressure and capacity specs
- Enhances braking reliability
Maintaining peak braking performance is critical for any V-twin, and the Harddrive Chrome Rear Master Cylinder delivers just that. With its 5/8-inch bore, this unit is specifically designed to match the original equipment specifications for compatible FL Softail and XL Sportster models. The chrome-plated steel construction not only provides a classic look but also offers enhanced durability against the elements, ensuring long-lasting performance on the road.
Precise Braking Control
- Chrome-plated steel construction for durability and style
- 5/8-inch bore size for OEM-spec fluid displacement
- Direct fit to stock mounting location
- Meets OEM specifications for brake pressure and capacity
Ideal for Classic Harley Upgrades
This master cylinder is an excellent choice for riders looking to replace a failing unit or upgrade their braking system with a reliable, OEM-spec component. Its direct-fit design simplifies installation, allowing you to get back to riding sooner. Combine this with a fresh brake fluid flush and proper bleeding to ensure a responsive and consistent rear brake feel, enhancing your control and confidence.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 29-024
- UPC: 191361137594
- Bore: 5/8 inch
- Length: 7.79 in
- Width: 7.12 in
- Height: 1.85 in
- Weight: 1.0582 lbs
- Country of Origin: China (Taiwan)
Common questions
Will this master cylinder fit my 1988 or newer Softail or Sportster?
This part is specific to 1986-1987 FL Softail and 1982-1987 XL Sportster models. Later model years may use different bore sizes or mounting configurations. Please verify compatibility for your exact year and model before ordering.
Is this master cylinder made from chrome-plated aluminum or steel?
This Harddrive master cylinder is constructed from chrome-plated steel. This material choice provides a classic chrome appearance and offers good corrosion resistance for long-term durability.
Do I need to replace my brake lines when installing this master cylinder?
You typically do not need to replace brake lines unless they are damaged or worn. However, it's always recommended to inspect your existing lines for any signs of wear, cracking, or leaks before reconnecting them to a new master cylinder.
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 | 820-51814 |
| WEIGHT | 1.06 lb |
