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GhostBikes.com£25.48Visit shop All Balls 18-1134 - Master Cylinder Rebuild Kit Rear For Beta Rr & X-Pro 125/250/300 2013-2025, Rr 350/390/430/480/520 2007-2025
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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.
| Model Part Number | 18-1134 |
|---|---|
| Brand | All Balls |
The kit includes the boot, cup seals, snap ring, spring, and necessary copper washers.
No, this kit is specifically designed for the rear master cylinder assembly.
You will need standard tools for removing the assembly and specialized circlip pliers to safely remove and install the snap ring.
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.
No, brake fluid must be purchased separately. Always use the grade of fluid specified in your owner's manual.
Air is likely trapped in the system; perform a thorough bleed of the rear brake hydraulic line.
Check if the internal cylinder bore has deep scratches or corrosion that prevents the new seals from seating properly.
Ensure the snap ring is fully seated and the spring is correctly oriented during installation.
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.
