Brembo Radial RCS19 Front Brake Master Cylinder (19mm Bore, Adjustable 18/20 Ratio with Long Folding Lever)Radial master cylinder designed for street bikes that allows maximum readiness and perfectly modulable braking in any conditions of use with excellent linearity between the force applied to the lever and the braking response. This brake master cylinder has the RCS system, patented by Brembo, for adjustment of the lever centre distance which allows you to obtain the ideal feeling between rider and bike. In just a few seconds using a simple screwdriver