Universal Motorcycle Brake Master Cylinder Assemblies

Shop universal motorcycle brake master cylinder assemblies designed for vintage restorations and custom builds. This collection includes complete front brake master cylinders compatible with 7/8-inch handlebars.

Universal master cylinder assemblies are ideal for replacing worn hydraulic units, upgrading older braking systems, or completing cafe racer, brat, tracker, scrambler, and chopper builds. A properly sized master cylinder ensures correct hydraulic pressure, firm lever feel, and reliable stopping performance.

Our inventory includes complete master cylinder assemblies with lever, reservoir, and mounting hardware — available in various bore sizes to match caliper requirements. All units are selected for durability, clean mounting compatibility, and dependable performance across vintage and custom motorcycles.

Old Bike Barn specializes in vintage motorcycle parts and traditional custom components curated by riders who wrench and build.