Cycle Pro Master Cylinder Repair Kit OEM 45063-72 3/4" Bore - Harley-Davidson Touring, Sportster & Dyna
About Cycle Pro
Cycle Pro supplies replacement and maintenance parts across the V-twin service catalog, covering the routine wear items a shop goes through week to week.
The Cycle Pro Master Cylinder Repair Kit provides the essential seals and internal components to restore braking pressure and responsiveness on your Harley-Davidson. This kit is a direct replacement for OEM part 45063-72, specifically designed for 3/4" bore master cylinders. It's a cost-effective way to revitalize your bike's front brake performance.
Why riders pick this
- OEM 45063-72 direct replacement
- For 3/4" bore master cylinders
- Complete internal seal and component kit
- Restores optimal braking pressure
- Improves brake lever responsiveness
When your Harley's brake lever feels spongy or loses its firm engagement, it's often a sign that the internal seals of your master cylinder are worn. This Cycle Pro kit addresses those common issues by supplying all the necessary wear components to rebuild the unit. By restoring the integrity of the master cylinder, you'll regain the consistent and reliable braking power crucial for safe riding.
Key Features for Enhanced Braking
- Direct replacement for OEM part 45063-72
- Specifically sized for 3/4" bore master cylinders
- Complete kit with all necessary seals and internal components
- Restores factory braking pressure and lever feel
Achieve Factory-Spec Brake Performance
This repair kit is an ideal solution for riders looking to refresh their braking system without the expense of a full master cylinder replacement. Installation typically requires a master cylinder kit tool and proper bleeding of the brake system afterward. Always verify your master cylinder's bore size and consult your Harley-Davidson service manual for detailed, model-specific instructions to ensure a successful rebuild.
Specifications
- Brand: Cycle Pro
- Manufacturer Part #: 18386
- OEM Part Number: 45063-72
- Bore Size: 3/4"
- Length: 5 in
- Width: 3 in
- Height: 1 in
- Weight: 0.5 lbs
- Country of Origin: China (Mainland)
Common questions
What is included in this 3/4" bore master cylinder repair kit?
This kit contains the internal seals, springs, and other wear components necessary to rebuild a 3/4" bore master cylinder to factory specifications.
How can I confirm if this kit fits my Harley-Davidson or Indian Motorcycle?
This kit is designed for V-twin motorcycles that utilize a 3/4" bore master cylinder, specifically replacing OEM part 45063-72. Please check your owner's manual or visually inspect your existing master cylinder's bore diameter before ordering to ensure compatibility.
Are special tools required for this master cylinder rebuild?
Yes, a master cylinder kit tool is typically needed for proper disassembly and reassembly. Additionally, you will need tools for bleeding your brake system. Refer to your specific service manual for a complete list of required tools and procedures.
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 | Cycle Pro |
| TYPE | Brakes |
| SKU | 865-01402 |
| WEIGHT | 0.5 lb |
