Harddrive Rear Master Cylinder Rebuild Kit - OEM 42810-07a - Harley Sportster 2004-Up
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.
Bring back firm, consistent rear braking on your Sportster with this Harddrive rear master cylinder rebuild kit. Designed as an OEM-spec replacement, it provides all the internal components needed to revitalize your existing master cylinder.
Why riders pick this
- Complete internal rebuild kit for rear master cylinder
- Restores rear brake pressure and pedal feel
- Direct replacement for OEM 42810-07a
- Fits Harley Sportster models 2004 and newer
- Includes all necessary seals, springs, and wear items
If your rear brake pedal feels soft or spongy, or you're experiencing reduced stopping power, the internal seals and springs within your master cylinder may be worn. This Harddrive rebuild kit offers a cost-effective solution to restore your 2004-and-newer Harley-Davidson Sportster's rear brake performance. It includes all the necessary components to refresh your existing master cylinder housing, bringing it back to factory specifications without needing a full replacement.
Renewed Rear Brake Performance
- Complete internal rebuild kit with seals and springs
- Direct replacement for OEM 42810-07a components
- Designed for Harley-Davidson Sportster models 2004 and newer
- Restores brake pressure and feel without replacing the entire unit
Maintain Your Sportster's Stopping Power
Properly functioning brakes are paramount for safety and control. This Harddrive rebuild kit is an ideal choice for riders experiencing rear brake fade or those performing comprehensive brake system maintenance. After installation, ensure you thoroughly bleed your entire rear brake system to remove all air and achieve optimal pressure and responsiveness.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 148202
- UPC: 191361165894
- Weight: 0.155 lbs
- Country of Origin: China (Taiwan)
Common questions
What is included in this rear master cylinder rebuild kit?
This kit contains all the internal seals, springs, and other wear components necessary to fully rebuild and restore your existing rear master cylinder housing to like-new condition.
Do I need to replace the entire master cylinder, or just rebuild it?
This kit is designed to rebuild your existing master cylinder housing. You will keep your current cylinder body and replace only the internal wear items, saving you the cost of a full replacement unit.
Is this kit compatible with earlier Sportster models?
This kit is specifically designed for Harley-Davidson Sportster models 2004 and newer with the OEM rear master cylinder part number 42810-07a. It may not be compatible with earlier 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 | 820-50605 |
| WEIGHT | 0.15 lb |
