800 mm master cylinder for front disc brakes, compatible with modification parts for hydraulic master cylinders and hand pump for 50/70/90/110/125 cc mountain bikes

Wide compatibility with small-displacement ATVs: This product is specifically designed for 50cc, 70cc, 90cc, 110cc, and 125cc ATVs (All-Terrain Vehicles). Piston diameter and output pressure are optimized for the front brakes of these models, ensuring broad compatibility. Complete master cylinder: This product is a complete hydraulic master cylinder (upper pump) including pump body, lever, reservoir, and mounting bracket. It provides a ready-to-use solution for repairing or upgrading the front brake system. Plug-and-play design: Designed to directly replace original upper pumps with worn seals, pistons, or levers, which can lead to a spongy brake lever, excessive pedal travel, weak braking performance, or oil leaks. The system must be bled after installation. Reliable brake control: As a central component of the hydraulic braking system, it restores the reliability and linearity of the front wheel braking, thus ensuring driving safety.