Abstract: A clutch spring kit that is particularly suited to replacing a standard motorcycle pressure plate in a diaphragm spring biased clutch assembly. The clutch assembly is activated by centrifugal force acting on spherical deflection elements. A plurality of pocket elements are generally arranged in an annular array formed in the spring side of a clutch pressure plate. The pocket elements are generally disposed radially inwardly of and adjacent to an upstanding lip element on the first side of the pressure plate. The pocket elements include ramps that extend within the pocket elements generally outwardly toward the lip element and angularly upwardly towards the spring side. A spherical deflection element, such as a ball bearing, is received in each of the pocket elements for generally radial movement along the ramp. A diaphragm spring, the periphery of which is confined by the lip element, is in spring biasing association with the first side of the pressure plate.

Abstract: A clutch spring kit that is particularly suited to replacing a standard motorcycle pressure plate in a diaphragm spring biased clutch assembly. The clutch assembly is activated by centrifugal force acting on spherical deflection elements. A plurality of pocket elements are generally arranged in an annular array formed in the spring side of a clutch pressure plate. The pocket elements are generally disposed radially inwardly of and adjacent to an upstanding lip element on the first side of the pressure plate. The pocket elements include ramps that extend within the pocket elements generally outwardly toward the lip element and angularly upwardly towards the spring side. A spherical deflection element, such as a ball bearing, is received in each of the pocket elements for generally radial movement along the ramp. A diaphragm spring, the periphery of which is confined by the lip element, is in spring biasing association with the first side of the pressure plate.

Abstract: A multi-spring system pressure plate member is provided for a spring biased clutch. The pressure plate member has a spring side and an opposed clutch side. The spring side of the pressure plate member includes spring confinement members for at least two clutch spring systems. The spring confinement members serve to hold spring members on said spring side in operative association with said pressure plate member. The spring confining members are provided to confine at least a diaphragm spring element and a compression coil spring element. The pressure plate member is configured to accept without modification either a diaphragm spring element or a set of compression coil spring elements. The clutch can be converted from one spring system to another by simply changing the spring elements.