At DMG Motorsports, we present the All Balls Master Cylinder Rebuild Kit (21-81137) — a complete, purpose-built repair solution for riders looking to restore firm, reliable braking performance without the expense of a full replacement master cylinder. When your brake master cylinder starts to leak or feel spongy, this kit gives you every component needed to re-seal it and get back to confident stopping power. All Balls Racing engineers its rebuild kits to OEM-level specifications, making this a trusted choice for shops and home mechanics alike.

Features:

• Contains all parts required to re-seal a leaking brake master cylinder
• Includes cup seals to restore proper hydraulic pressure and sealing
• Copper washers included for a secure, leak-free banjo bolt connection
• O-rings included to prevent fluid seepage at critical seal points
• Replacement screws included where applicable for a complete, correct rebuild
• Engineered to OEM fit and performance standards for dependable results
• A cost-effective alternative to replacing the entire master cylinder assembly
• Ideal for restoring lost brake feel, pressure, and stopping performance

Fitment