Master Cylinder Rebuild Kit

Bring your rear brake feel back to where it should be with the PROX Brake Master Cylinder Rebuild Kit. If your brake lever/pedal feels spongy, inconsistent, or your master cylinder is leaking or worn, a rebuild is a smart and cost-effective way to restore dependable performance without replacing the full assembly.

This kit is assembled with high-quality components and is designed and manufactured to meet or exceed OEM parts, helping you achieve reliable sealing, smooth operation and consistent brake pressure—ideal for motocross and off-road use where braking performance matters most.

Key features:

• ✅ High-quality components for dependable service life
• ✅ OEM-level design (meets or exceeds OEM specifications)
• ✅ Complete rebuild solution with all necessary components included

Benefits of use:

• 🔹 Restores consistent braking power and lever/pedal feel
• 🔹 Helps solve leaks, pressure loss and wear-related braking issues
• 🔹 Cost-effective alternative to replacing the entire master cylinder

Technical specifications:

• 📌 Brand: PROX
• 📌 Vendor part number: 37.910028
• 📌 Type: Brake Master Cylinder Rebuild Kit
• 📌 Mounting position: Rear
• 📌 Units: Kit
• 📌 Color/finish: Black / Raw

Why choose this product?

• ⭐ OEM-spec rebuild quality from a trusted brand
• ⭐ Includes the parts you need for a proper master cylinder refresh
• ⭐ A practical fix to keep your bike’s braking system performing reliably