Moose Offroad 18-3315 Rear Brake Caliper Rebuild Kit — 2005-2024 Beta RR RS RR-S RX Xtrainer

Moose Offroad — Premium Sealing Components, Precision Hardware, and Restored Rear Braking Control

Stop the drag and restore your stopping power with the Moose Offroad 18-3315 Rear Brake Caliper Rebuild Kit. Over time, the extreme heat cycles and abrasive mud of off-road riding cause caliper seals to harden, crack, or swell, leading to a "mushy" lever feel or a dragging rear brake. This professional-grade kit is engineered specifically for the Beta braking system, providing everything you need to refresh your rear caliper to factory-spec performance.

Each kit is a comprehensive solution, containing all necessary high-temperature rubber boots and internal pressure seals to prevent fluid leaks and ensure smooth piston retraction. Where applicable, the kit also includes high-strength brake pins to replace original hardware that may be grooved or corroded. Whether you are prepping for a Hard Enduro season or maintaining your dual-sport machine, this kit ensures your rear brake remains reliable and responsive in the most demanding conditions.

• Complete Rebuild Solution: Includes all internal seals, external dust boots, and pins necessary for a total rear caliper refresh.
• High-Heat Resistance: Rubber components are formulated to maintain elasticity and sealing integrity under intense braking heat.
• Smooth Piston Action: Prevents caliper dragging and uneven pad wear by ensuring the piston moves and retracts freely.
• OEM Precision: Direct replacement for factory hardware on Beta models ranging from 2005 through 2024.
• Off-Road Ready: Built to withstand the chemical cleaners and abrasive grit common in motocross and trail riding.

Moto-House MX Pro Tip:

A sticking rear caliper is one of the most common causes of premature brake pad wear and boiled brake fluid. When rebuilding your caliper with the Moose Offroad 18-3315 kit, cleanliness is paramount. Use a dedicated brake parts cleaner to remove all old oxidation from the caliper bore and piston before installing the new seals. Apply a small amount of clean brake fluid to the new seals during assembly to prevent tearing. Always finish the job by flushing the system with fresh DOT 4 fluid to ensure 100% air-free performance.

Technical Specification	Details
Mounting Position	Rear Caliper
Application	Moose Racing / OEM Replacement
Kit Contents	Rubber Seals, Boots, and Brake Pins
Fitment Range	Beta 125cc - 525cc (2005-2024)

FAQ Questions

Q) Does this kit include the caliper piston?
A) No, this is a seal and hardware kit. If your piston is severely pitted or damaged, it should be purchased separately or replaced alongside this kit.

Q) Will this fit the 300 RX motocross model?
A) Yes, this kit is compatible with the Beta 300 RX rear braking system for the 2021-2024 model years.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. We are the best motocross shop in Central Florida with lightning-fast shipping.