Abstract: A centrifugal clutch comprises centrifugal masses (3) pivoted on a first surface (2a) of a first support disk (2) having an axis of rotation (X); each mass (4) is provided with a friction pad (8) which, during rotation, by effect of the centrifugal force, comes in contact with the inner wall (9a) of an external drum (9) coaxial to the support disk (2); the centrifugal clutch further comprises a group (30) for returning said centrifugal masses (3) connected to said support disk (2), the group (30) include at least one elastic element (12), at least one motion transferring element (15) acting between each centrifugal mass (3) and the corresponding elastic element (12), and an adjusting element (14), operable and positioned in a substantially parallel manner to the axis (X) of rotation of the support disk (2), for varying pre-load of the elastic element (12).

Abstract: A centrifugal clutch comprises centrifugal masses (3) pivoted on a first surface (2a) of a first support disk (2) having an axis of rotation (X); each mass (3) is provided with a friction pad (8) which, during rotation, by effect of the centrifugal force, comes in contact with the inner wall (9a) of an external drum (9) coaxial to the support disk (2); the centrifugal clutch further comprises a group (30) for returning said centrifugal masses (3) connected to said support disk (2), the group (30) include at least one elastic element (12), at least one motion transferring element (15) acting between each centrifugal mass (3) and the corresponding elastic element (12), and an adjusting element (14), operable and positioned in a substantially parallel manner to the axis (X) of rotation of the support disk (2), for varying pre-load of the elastic element (12).