Brembo 19 RCS Adjustable Ratio Radial Brake Master Cylinder

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Brembo Radial Master Cylinders are found on the fastest bikes in the world because they’re powerful, reliable and built to exacting tolerances for consistent performance under a wide range of conditions. Brembo’s 19 RCS master cylinder is no exception. It offers the unique ability to change brake lever ratios from 19x20 (for power) to 19x18 (for feel) with a simple turn of the screw, something not possible on other Brembo brake master cylinders. The 19 RCS is manufactured using a combination of forge-casting and CNC-machining. Forged parts have a particular advantage over parts machined from billet when it comes to strength since the metal’s grain structure follows closely the shape of the part as it is pressed into its final form. After forging, the aluminum master cylinder blank is then machined to accept all of its hardware: banjo bolt, brake reservoir spigot, lever attachment and – most critical, the brake piston assembly. This multi-stage manufacturing process ensures both strength, through the forging process and precision via CNC finishing - both of which contribute to the master cylinder’s consistent, exacting performance that has made it the “must have” brake upgrade component.

Every Brembo 19 RCS master cylinder comes complete with a break-away lever for crash survivability, a dual-line banjo bolt and a micro-switch controller for street applications allowing you to activate the rear brake light without the need to buy a separate pressure-sensitive banjo bolt switch.

We do not yet have Brembo Brakes on our website. Call Mike at 866.931.6644 ext 804 to order your Brembo 19 RCS master cylinder today. You can also email us with any questions you have – send those to TJ at RIDERSDISCOUNT dot COM with BREMBO RCS in the subject line and we’ll get back to you fast.

Everything as it comes straight out of the box: 19RCS master cylinder, brake light micro switch, dual-line banjo bolt, stickers and instructions.


Folding levers used to be only the domain of factory teams, now they’re included as standard with every RCS master cylinder.


A screw behind the rubber cap on the lever allows you to easily switch from 19x20 to 19x18 lever ratios.


Further aiding in safety is the color-coded cam assembly. When viewed from the top, if you see red, you know you’re using a 19x18 ratio. If you see black, you’re at 19x20.

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This simple kit includes everything you need for attaching a brake fluid reservoir to your Brembo RCS master cylinder – or any other brake master cylinder. A lightweight aluminum bracket is used to attach the fluid reservoir to the master’s clamp for less clutter at the controls and a simple, clean installation.

Installation takes less than five minutes on any master cylinder that has a vertical split where it mounts to your bike’s clip-ons.


No special tools required for installation.


The fluid reservoir’s spigot is located on the bottom, reducing the risk of air being drawn into the brake system when fluid levels become low.


Often, using the OEM brake fluid reservoir can be a pain when installing an aftermarket brake master cylinder like this one from Brembo. This kit simplifies life and gives your bike a trick look too!

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This same feature was once only available to race teams but it is now available to anyone with a Brembo RCS master cylinder! This kit allows the rider to adjust Brembo brake lever reach on the fly to compensate for fade and pad wear. The kit is easy to install and comes with enough cable to cross

The kit is fairly simple to install. It comes with everything you see here.


Simply remove the knurled adjuster that’s on the RCS master cylinder and plug in the remote adjuster.


The perch for the adjuster has a swiveling mechanism which allows you to position it as you like and then secure it there by tightening the fasteners.