All Balls Master Cylinder Rebuild Kit Rear - 18-1134
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Full details
The All Balls Master Cylinder Rebuild Kit (18-1134) is an essential maintenance solution for off-road enthusiasts and mechanics looking to restore leaking or unresponsive rear brake master cylinders to factory-like performance. Designed specifically for various Beta motorcycle models, this kit offers a cost-effective alternative to replacing the entire assembly, though it requires mechanical proficiency and precision during the installation process to ensure safety and system integrity.
All features
| Model Part Number | 18-1134 |
|---|---|
| Brand | All Balls |
Extended Product Information
FAQs
What is included in the 18-1134 kit?
The kit includes the boot, cup seals, snap ring, spring, and necessary copper washers.
Will this work on my front master cylinder?
No, this kit is specifically designed for the rear master cylinder assembly.
Do I need special tools for this rebuild?
You will need standard tools for removing the assembly and specialized circlip pliers to safely remove and install the snap ring.
How do I know if my cylinder is too damaged to be rebuilt?
If you see deep grooves or pitting in the inner bore wall, a simple seal kit will not suffice, as the seals cannot maintain a proper vacuum.
Is brake fluid included in the kit?
No, brake fluid must be purchased separately. Always use the grade of fluid specified in your owner's manual.
Troubleshooting
Brake pedal remains spongy after rebuild
Air is likely trapped in the system; perform a thorough bleed of the rear brake hydraulic line.
Visible leakage continues after installation
Check if the internal cylinder bore has deep scratches or corrosion that prevents the new seals from seating properly.
Master cylinder piston sticking
Ensure the snap ring is fully seated and the spring is correctly oriented during installation.
Pros and Cons
Pros
- High-quality components matching OEM standards
- Cost-effective solution compared to full assembly replacement
- Includes all essential seals and springs for a complete rebuild
- Reliable sealing performance to prevent brake fluid loss
Cons
- Requires advanced mechanical skills to install safely
- Requires careful inspection of the cylinder bore before installation
- Brake system work demands rigorous air-bleeding procedures
Setup, Compatibility & Care
To ensure proper function, carefully remove the master cylinder from the motorcycle and clean the exterior before disassembly. Inspect the internal cylinder bore for scoring; if the bore is deeply scratched, a rebuild kit may not resolve the issue. Always use fresh DOT-approved brake fluid during the reassembly process. Ensure all seals are seated correctly without twisting or pinching. This kit is compatible with specific Beta RR, RR-S, RS, and XTrainer models. Always cross-reference your specific bike year and sub-model against the manufacturer fitment list before starting the installation. After reassembly, perform a thorough brake bleed to remove all trapped air from the hydraulic lines.