Brake Assemblies & Master Cylinders - Rear (Left Side)

The Rear (Left Side) Brake Assemblies & Master Cylinders collection includes handlebar-mounted hydraulic units used to operate rear disc brakes on a wide range of powersports vehicles. These assemblies combine a brake lever, fluid reservoir, and master cylinder to deliver consistent hydraulic pressure to the rear caliper. Over time, seals can fail, reservoirs may crack, or levers can bend—reducing braking efficiency and safety. Many of the assemblies in this group fit common GY6-style scooters such as the TaoTao ATM50, Roketa 150cc models, and similar machines from Jonway and Peace Sports.

This category may include:

• Left-side master cylinders designed for rear disc brake systems
• Lever-and-reservoir assemblies for scooters, mopeds, ATVs, and dirt bikes
• Direct-fit components for GY6 50cc–150cc platforms
• Units compatible with TaoTao, Roketa, Jonway, Peace Sports, and related brands
• Pre-threaded fittings and mounting points for straightforward installation

Additional notes about this collection:

• Helps restore strong, consistent braking pressure to the rear caliper
• Useful for fixing leaks, soft lever feel, or unresponsive braking
• Suitable for standard maintenance, safety inspections, or full brake system refreshes
• Designed for proper alignment and easy installation when matched to the correct handlebar style

Browse the Rear (Left Side) Brake Assemblies & Master Cylinders category to find dependable replacements that help maintain safe and responsive rear braking performance.