Clutch with centrifugal assembly, especially for a motorcycle

A clutch comprising:

• a fixed hub, a movable hub, a plurality of plates interposed between the fixed hub and the movable hub;
• wherein the fixed hub and the movable hub are configured to rotate together and are further configured to axially slide respectively moving away or coming closer, to transmit a variable axial load on the plurality of plates and to selectively transmit a torque acting on the clutch;
• the clutch further comprising a centrifugal pressure-plate assembly to at least partially control the variable axial load, the centrifugal pressure-plate assembly comprising:
• a mass carrier configured to rotate together with the clutch;
• a plurality of mass elements radially movable in the centrifugal pressure-plate assembly, wherein each mass element comprises a pivot connected to the mass carrier for a displacement towards an external position under centrifugal effects;
• wherein, with the displacement under centrifugal effects, the plurality of mass elements are further configured to exert an axial thrust on a thrust surface of the centrifugal pressure-plate assembly, in order to bring the movable hub closer to the fixed hub and to increase the variable axial load;
• wherein each mass element comprises at least one respective rolling element contacting with the thrust surface;
• and
• wherein the thrust surface comprises a sloped profile raised towards the external position.