Harddrive Master Cylinder Rebuild Kit - 9/16" Bore Front - Harley & Indian V-Twin
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.
Regain crisp, responsive front braking with the Harddrive master cylinder rebuild kit for 9/16-inch bore applications. This comprehensive kit provides all the necessary internal components to restore your front master cylinder to optimal performance.
Why riders pick this
- Complete kit for 9/16-inch bore master cylinders
- Restores front brake performance and feel
- Includes all necessary internal seals and components
- Works with OEM and compatible aftermarket units
- Cost-effective alternative to full master cylinder replacement
Over time, the internal seals and components within your front master cylinder can wear, leading to a spongy brake lever, reduced stopping power, or even fluid leaks. Rather than replacing the entire unit, this Harddrive rebuild kit offers a cost-effective solution to refresh your braking system. It's designed to bring both OEM and compatible aftermarket master cylinders back to factory specifications.
Restore Braking Confidence
- Complete internal kit for 9/16-inch bore front master cylinders
- Includes all seals, pistons, and springs for a full rebuild
- Compatible with many OEM Harley and Indian master cylinders
- Also works with aftermarket master cylinders of the same bore size
Essential Brake System Maintenance
A properly functioning front brake is critical for safe riding. This rebuild kit is an ideal choice for riders experiencing fading brake performance or those undertaking a full brake system overhaul. Ensure you bleed your brake lines thoroughly after installation to remove any air and achieve maximum stopping power.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 144125
- UPC: 191361119569
- Bore Size: 9/16 inch
- Weight: 0.2948 lbs
- Country of Origin: China (Taiwan)
Common questions
What's included in this master cylinder rebuild kit?
This kit contains all the internal seals, pistons, springs, and other components required to fully rebuild and restore your front master cylinder to factory performance.
Will this kit fit my OEM Harley master cylinder?
Yes, this kit is designed to work with OEM Harley and Indian front master cylinders that utilize a 9/16-inch bore size.
Can I use this on an aftermarket master cylinder?
Absolutely, as long as your aftermarket master cylinder also has a 9/16-inch bore and follows a standard internal design, this kit should be compatible.
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 | 820-50601 |
| WEIGHT | 0.3 lb |
