Abstract: A combined mechanical and centrifugal clutch for a motor driven vehicle which has several original equipment manufacturer's components including an inside and an outside pressure plate (70), also frictional material for transmitting torque through the clutch. A lock-up housing (84) is attached to the outside pressure plate and contains a number of pivotally connected camming fingers (100) that force the outside pressure plate into tensional contact wit the frictional material by the camming force of the fingers caused by rotational centrifugal force. The operational portion of the mechanical clutch is unaltered permitting mechanical release of the clutch with the centrifugal portion added to lock-in the torque transmitting capabilities permitting increased capacity and positive engagement. Selecting the optimum rotational engagement speed is achieved by the use of weights and altering the springs or changing spring compressibility.

Abstract: An improved motorcycle slider clutch which utilizes several original equipment manufacturers components, also an aftermarket basket (34), housing gear assembly (44) and a pressure plate (74). The pressure plate engages the nest of discs (32) when compressed by a number of fingers (82) configured to create linear force when subjected to centrifugal action. An enclosure (100) surrounds the basket (34) and retains the fingers. This action defines the first or mechanical stage of operation. A number of counterbalanced fingers (120) are also rotatably contained in the enclosure (100) but are held from engagement with a restraining hub (142) connected to a fluid pressurized cylinder (136). The second, or pressurized fluid actuated stage, is engaged electrically in a timed sequence relieving the pressure allowing the counterbalanced fingers to exert pressure on the clutch discs and plates at the optimum moment.

Abstract: An improved motorcycle slider clutch which utilizes several original equipment manufacturers components, also an aftermarket basket (34) and a housing gear assembly (44). A pressure plate (100) engages the nest of discs (32) when compressed by a number of fingers (114) configured to create linear force when subjected to centrifugal action. A flange (110) encloses the basket (34) and retains the fingers. A cast cover (128) contains a pneumatic cylinder with a piston (140) that restrains movement of the plate in the first stage of actuation and a second piston (156) in a chamber created by a hollow cap (154) providing similar restraint for a second stage. The operation is controlled pneumatically with solenoid valves (146) and a millisecond timer (168) allowing a multi-stage starting sequence at a timed interval.

Abstract: A motorcycle slider clutch utilizing several original equipment manufacturers components, such as the output shaft (20) with gear cluster (24) and bearing (26), the center hub (30) and friction disks with plates (32) attached to a slider basket (34) and a resiliently mounted gear assembly (44). This combination contains the above described components along with a slider plate assembly (64) having an inside pressure plate (74) spring loadedly attached. The inside plate (74) further contains a group of fingers (82) that force the plate into contact with the disks and plates (32) making a union between the rotating elements due to the centrifugal force applied by the fingers (82). The apparatus employs the use of existing oil lubricated standard clutch components heretofore impractical.