A centrifugal clutch assembly particularly suited for a door lock system which utilizes a flywheel mass driven by an electric motor to move an actuating member of the locking system between a locked and an unlocked position is provided as part of the connecting means between the flywheel mass and the actuating member. The centrifugal clutch assembly is arranged to include a rotatably mounted carrier driven by the flywheel mass and carrying thereon centrifugal weights mounted for movement between a clutch-engaged position and a clutch-disengaged position. A restoring spring operates to restore the centrifugal weights to the clutch-disengaged position. The centrifugal weights include frictional pads defining first frictional engaging surfaces and a driven output member arranged in driving connection with the actuating member of the locking mechanism is formed to define second frictional engaging surfaces adapted to be frictionally engaged by the first frictional engaging surfaces. The friction pads defining the first frictional engaging surfaces are mounted upon the centrifugal weights by springs which act in a direction generally perpendicular to the frictional surfaces and stop members are provided for limiting movement of the centrifugal weights in a direction toward the clutch-engaged position in order to limit the maximum engaging force which is applied between the first and second frictional engaging surfaces.