Royal Enfield Front Master Cylinder Assembly (Endurance) for Classic, Bullet & Thunderbird UCE

The Master Cylinder Assembly is a complete, ready-to-install unit that converts mechanical lever pressure into hydraulic force to activate the front brake caliper. This “Endurance” type assembly is manufactured from high-quality aluminum alloy and cast iron, designed to resist high internal pressures and provide consistent braking performance across various temperatures.

The assembly typically comes finished in matte black or gloss black to match the handlebar controls and includes the integrated fluid reservoir, the brake lever, and the brake light switch. It is a critical component for maintaining rider safety, and using the genuine Endurance-spec unit ensures that the piston bore diameter (typically 14mm) matches the factory-calibrated braking ratio.

Key Features:

• OEM Endurance Build: A 100% genuine part (147650/A), matching the exact specifications of the unit fitted at the factory.

• Complete Assembly: Includes the master cylinder body, fluid reservoir with sight glass, reservoir cap, brake lever, and brake light switch.

• Corrosion Resistant: Finished with weather-resistant coatings to prevent oxidation and maintain a premium look.

• Integrated Sight Glass: Features a transparent window for quick and easy monitoring of brake fluid levels.

• Direct Bolt-On: Designed for 7/8″ (22mm) handlebars; uses a standard 10mm banjo bolt for the brake line connection.

Specifications:

• Manufacturer: Endurance Technologies Limited (OEM for Royal Enfield).

• Compatibility: Classic 350/500, Bullet 350/500, Electra, and Thunderbird 350/500 (UCE Models).

• Bore Size: ~14mm.

• Brake Fluid Type: DOT 4 (Specified on the reservoir cap).