HEL Solid Billet Adjustable Thumb Brake – Mk1 & Mk2

The HEL Solid Billet Adjustable Thumb Brake (Mk1 and Mk2) is engineered for riders who demand precision control, adjustability, and race-grade durability. Crafted from high-quality 6082-T6 aluminium billet, these thumb brakes offer a lightweight yet rigid design, ensuring consistent lever feel and superior braking performance across all conditions.

Available in Mk1 and Mk2 versions, these adjustable thumb brakes cater to a variety of setups — from street motorcycles to full race bikes — allowing you to fine-tune lever travel and braking response for maximum confidence and control.

Performance & Engineering

• Solid billet construction: CNC-machined from a single block of aluminium for strength, precision, and minimal flex

• Adjustable lever throw: Easily customise lever travel to match your preferred feel and braking style

• Durable finish: Anodised black or grey options, hand-polished for a premium look

• Compact design: Minimises interference with other controls while maximizing ergonomics

• Race-proven reliability: Designed and manufactured in the UK by HEL Performance

Mk1 vs Mk2 Differences

• Mk1: Original adjustable thumb brake with a compact profile and smooth adjustment mechanism, ideal for early HEL builds or standard setups

• Mk2: Improved ergonomics, enhanced lever reach adjustment, and upgraded internal mechanism for even smoother feel and increased durability — perfect for modern performance bikes

Both versions maintain compatibility with HEL master cylinders and are designed to withstand the rigours of track and street use.

Key Features

• CNC-machined from solid 6082-T6 aluminium billet

• Adjustable lever throw for personalised braking feel

• Lightweight, compact, and highly durable

• Hand-finished anodised options for premium aesthetics

• Direct fit for HEL master cylinders (V1 and V2 series)

• Manufactured in the United Kingdom

Fitment & Installation

The HEL Mk1 and Mk2 thumb brakes are compatible with most HEL master cylinders and standard motorcycle mounting points.
Before installation, confirm your handlebar setup and master cylinder compatibility.

For full installation guidance and technical specifications, visit:
HEL Performance Fitment & Installation Guide

Why Choose HEL Performance

Trusted by professional riders and racing teams worldwide, HEL Performance components are engineered for precision, durability, and ultimate control. The adjustable thumb brake gives riders confident, predictable braking in any scenario — a must-have for performance street bikes, track bikes, and custom builds.