At DMG Motorsports, we present the All Balls Racing Master Cylinder Rebuild Kit (21-81017) — a complete, precision-engineered seal kit built to bring a leaking or underperforming brake or clutch master cylinder back to like-new condition. Rather than replacing an entire master cylinder assembly, this kit lets you restore consistent, firm lever or pedal feel by refreshing the internal wear components that fail over time due to heat, moisture, and age. It's the go-to solution trusted by riders and shops alike for straightforward, reliable master cylinder service.

This kit is designed for vehicle owners and mechanics who require a complete set of components to address leaks and other common issues in master cylinders, and it comes packed with every part needed to get the job done right the first time. Each component is manufactured from durable materials for long-lasting repairs and dependable, consistent performance once installed.

Features:

• Complete re-seal solution containing all parts needed to repair leaking brake or clutch master cylinders
• Includes cup seals to restore proper hydraulic sealing and lever/pedal feel
• Copper crush washers included for a leak-free banjo bolt connection
• O-rings included to seal critical mating surfaces within the master cylinder body
• Replacement screws included where applicable for a secure, factory-style rebuild
• Manufactured from high-quality, durable materials for long-lasting, dependable performance
• Fitment-specific kit designed as a direct match for your master cylinder application — verify part number 21-81017 fits your model before ordering
• Ideal for routine maintenance or a full master cylinder overhaul, saving the cost of a complete replacement unit

Fitment