The cafe racer master cylinder is a component of a motorcycle's braking system that converts the force exerted by the brake lever or pedal into hydraulic pressure. This pressure is then transmitted to the brake calipers, which apply the brakes to the wheels. On a cafe racer type motorcycle, the master cylinder is usually located on the handlebars.
In the case of a cafe racer, the master cylinder is usually a radial master cylinder. The radial master cylinder has a more compact design and can provide a more precise and consistent brake feel. They also have an improved appearance and look better compared to the traditional master cylinder.
When upgrading a cafe racer, the cafe racer master cylinder is one of the components that can be changed for better performance and/or better looks.
It is important to ensure that the cafe race r master cylinder is compatible with the brake system and brake calipers, and that the correct brake lines and fittings are used to ensure a safe and correct installation.
It is recommended that you have a professional perform this modification as it requires specific tools and knowledge to ensure that the cafe racer master cylinder is installed correctly and the motorcycle is safe to use.