Description
Product Overview
The BossBearing Brake Cylinder Repair Kit is a comprehensive solution for restoring the primary brake cylinder on ATVs, UTVs, dirt bikes, street bikes and snowmobiles. Crafted from high‑strength aluminum and pre‑lubricated steel components, the kit includes a precision‑machined cup, double‑lip rubber seals, copper washers, O‑rings and the necessary screws and boot. Each part meets or exceeds OEM specifications, ensuring a perfect fit and long‑lasting durability. The kit’s compact 8 x 10 x 1‑inch packaging makes storage simple, while the 2‑pound weight keeps it portable for on‑site repairs.
Usage
Designed for both DIY enthusiasts and professional mechanics, this kit is ideal for restoring brake performance after fluid leaks or seal wear. Install the components in any standard master cylinder housing (model 18‑1111B) on off‑road vehicles, ensuring a secure seal and consistent brake feel. The kit’s versatility covers a broad range of models, making it a go‑to choice for weekend riders, fleet maintenance shops, and winter sport operators. 
Why Choose Us
BossBearing stands out for its commitment to quality and customer confidence. Every kit undergoes rigorous testing and is backed by a 1‑year warranty, guaranteeing performance after installation. Our double‑lip seals reduce drag and prevent future leaks, while the pre‑lubricated bearings ensure smooth operation from day one. By sourcing premium materials and adhering to strict manufacturing tolerances, we deliver a product that outperforms generic aftermarket alternatives.
Key Features
- All‑in‑one kit: cup, seals, washers, O‑rings, screws and boot included.
- Double‑lip rubber seals for superior leak protection and low drag.
- OEM‑grade materials meet or exceed original specifications.
- Pre‑lubricated bearings for immediate, smooth brake response.
- 1‑year warranty provides peace of mind and reliable support.
FAQ
What vehicles are compatible with this kit?
The kit fits standard master cylinders on ATVs, UTVs, dirt bikes, street bikes and snowmobiles that use the 18‑1111B model number.
Do I need additional tools to install the kit?
Basic hand tools such as a socket set and screwdrivers are sufficient. All components are designed for straightforward installation without specialized equipment.
How long does the installation typically take?
For an experienced mechanic, the repair can be completed in 30‑45 minutes. DIY users may need a bit longer, but the comprehensive instructions simplify the process.
Is the kit covered by a warranty?
Yes, BossBearing provides a 1‑year warranty covering defects in materials and workmanship, ensuring confidence in your purchase.
Can I use this kit for a vehicle that has a different master cylinder model?
The kit is specifically engineered for the 18‑1111B model. Using it on other models may result in improper fit or reduced performance.





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