HEL Solid Billet Rear Master Cylinder (Single / Twin Port)

The HEL Performance Rear Master Cylinder Range represents the next level in precision engineering, race-proven design, and UK-manufactured quality. Machined entirely from solid 6082-T6 aluminium billet, each master cylinder delivers lightweight strength, superior hydraulic feel, and uncompromising reliability — whether on the street, the circuit, or the Isle of Man TT.

Both versions — Standard Rear Master Cylinder and Twin Rear Master Cylinder — are engineered to integrate seamlessly behind the heel plate of most motorcycles, thanks to their square-format design and slotted mounting holes for precise positioning. Each unit is assembled, pressure-tested, and quality checked in-house by HEL before dispatch.

1. Standard Rear Master Cylinder

The Standard HEL Rear Master Cylinder is designed for riders seeking clean installation, smooth rear brake feel, and high-performance response. Featuring a 13 mm bore size, this master cylinder offers excellent modulation and control for a wide range of motorcycles — from custom street builds to race bikes.

Available in Black Anodised or Nickel-Plated finishes, with the signature HEL “H” logo individually hand-painted for a premium touch.

Key Highlights:

• CNC machined from solid 6082-T6 billet aluminium for exceptional strength and weight savings

• 13 mm piston bore for smooth, progressive rear brake control

• Compact, square body design for sleek fitment behind heel plates

• Available in Black or Nickel Plated finishes

• Fully assembled, tested, and ready for installation

• Designed and manufactured in the UK by HEL Performance

2. Twin Rear Master Cylinder

The HEL Twin Rear Master Cylinder takes performance and flexibility a step further. Built on the same CNC billet foundation, this version adds dual ports to allow both thumb/finger brake and foot control to operate the same rear caliper — ideal for track riders and racers who require dual braking control options.

This innovative system replaces the traditional reservoir setup with twin brake lines, where one line acts as the reservoir for the other, allowing a clean, compact setup. Only one braking method (thumb or foot) can be engaged at a time, providing safe and efficient operation under all conditions.

Key Highlights:

• Twin-port configuration for thumb/finger brake and rear foot control integration

• Supplied with M10 x 1.00 and M12 x 1.00 banjo bolts plus copper crush washers

• 13 mm bore size for optimal hydraulic performance

• Hard Anodised Black or Grey finish with hand-painted HEL “H” logo

• Fully CNC-machined internals assembled and tested in-house

• Designed for riders who demand total control and versatility on track or road

Fitment & Installation

Both versions feature universal slotted mounts for flexible installation on a wide range of performance motorcycles.
For detailed fitment specifications and installation guidance, visit:
👉 HEL Performance Installation & Fitment Guide

Professional installation and proper bleeding are recommended to ensure optimal hydraulic performance and reliability.

Why Choose HEL Performance

HEL Performance components are trusted by MotoGP, World Superbike, and Isle of Man TT teams for their precision engineering, UK craftsmanship, and race-proven reliability. Every part is built to deliver unmatched feel, performance, and safety, ensuring you get the very best braking response — every time you ride.