Harddrive Rear Master Cylinder 3/4" Bore Chrome - Harley Super Glide, Low Rider, 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.
Get back that confident feel at the brake pedal with a Harddrive Chrome Rear Master Cylinder. This 3/4" bore unit is a direct bolt-in replacement for specific 1979-1983 Harley-Davidson FX and Sportster models. It’s built to deliver OEM-spec braking performance, ensuring reliability on the road.
Why riders pick this
- Chrome-plated finish for classic style
- 3/4" bore for accurate brake pressure
- Direct bolt-in replacement
- OEM-spec braking performance
- Restores confident brake feel
When you're rolling on a classic 1979-1983 Harley FX or Sportster, maintaining optimal braking performance is crucial. The Harddrive Chrome Rear Master Cylinder with a 3/4" bore is engineered to be a direct replacement, bolting right into your stock mounting location. This means less time wrenching and more time riding, all while ensuring your braking system meets original equipment standards.
Precision Braking for Your V-Twin
- 3/4" bore size matches OEM specifications
- Brilliant chrome-plated finish
- Direct fit into stock rear master cylinder mount
- Delivers OEM-spec braking performance
Upgrade for Vintage Harley Models
This master cylinder is an essential component for any rider looking to refresh or repair their vintage Harley-Davidson's braking system. Its chrome finish adds a touch of classic style while its internal components ensure reliable stopping power. Whether you're restoring a Sturgis or keeping your Sportster on the road, this master cylinder provides the consistent brake feel you need.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 29-002
- UPC: 191361135842
- Bore Size: 3/4 inch
- Length: 7.79 in
- Width: 7.12 in
- Height: 1.85 in
- Weight: 0.8818 lbs
- Country of Origin: China (Taiwan)
Common questions
Will this master cylinder fit my Harley-Davidson Sportster?
Yes, this Harddrive master cylinder is designed for 1980–1983 Harley-Davidson Sportster (XL) models. It also fits 1979–1982 Harley-Davidson FX models. Please confirm your exact model year before ordering.
Is this a direct bolt-in replacement, or does it require modifications?
This is a direct bolt-in replacement. It is designed to mount precisely in the stock rear master cylinder location on compatible models without any modifications needed.
What is the bore size of this master cylinder?
This Harddrive Rear Master Cylinder features a 3/4-inch bore size, which matches the original equipment specification for the compatible Harley-Davidson FX and 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 | Brakes |
| SKU | 820-51813 |
| WEIGHT | 0.88 lb |
