The Moto-Master RMC-R radial master brake cylinder is a direct performance upgrade for the brake system. CNC machined from aerospace aluminum block. Fully adjustable lever distance and free play. Ergonomically designed lever with optimized ratio for optimal power transmission. The low-friction rotary action improves rider feedback. The remote brake fluid reservoir prevents air intake. 12mm piston diameter for Supermoto use. Designed for use with Moto-Master stainless steel brake lines.