Dry clutches have been widely used in motorcycle racing applications due to their low mass and higher transmission efficiency if compared to the wet solution. The object of the thesis, carried out in collaboration with STM Italy srl, is the study of a progressive disc designed to improve the engagement phase of a Moto3 dry clutch. The aim is to define a suitable finite elements model to simulate the experimental testing procedure of the disc. The second goal is to create a model to evaluate the engagement phase with this solution. At first, the slipper clutch assembly is presented and its advantages under braking are highlighted; then, dry and wet clutches are compared.