Multi-linking, rear suspension system for two-wheeled motor vehicles

1. A rear suspension system for two-wheeled vehicles, comprising:

an upper pivot arm assembly pivotally connected to a frame of the vehicle;

a lower pivot arm assembly pivotally connected to the frame of the vehicle;

a control arm having a first end thereof connected to the upper pivot arm assembly, and a generally opposite second end thereof connected to the lower pivot arm assembly;

a rear wheel supporting unit connectable to an axle of a rear wheel of the vehicle at a first end thereof, and having an upper second end thereof connected to the upper pivot arm assembly, and having a lower second end thereof connected to the lower pivot arm assembly; and

a compressible shock unit interconnected between the rear wheel support unit at one end thereof, and the vehicle frame at the opposite end thereof,

wherein the rear wheel support unit is comprised of an upper arm assembly and a lower arm assembly which are interconnected and include means for connecting to the rear wheel;

wherein the lower arm assembly includes a base connected to the lower pivot arm assembly, and a first elongated arm extending from the base and including a connection point for the rear wheel, and a second elongated arm extended from the base generally parallel to the first arm and including a connection point for the rear wheel; and

wherein the elongated arms of the lower arm assembly are adjustable in length.

2. The suspension system of claim 1 , wherein the rear wheel connection means comprises generally parallel and spaced apart first and second axle plates having aligned apertures for accepting an axle of the rear wheel, the first and second axle plate being connected to first ends of the upper and lower arm assemblies.

3. The suspension system of claim 2 , wherein the upper arm assembly is comprised of a base pivotally connected to the upper pivot arm assembly and a first elongated arm extending from the base to a connection point at the first support axle plate, and a second elongated arm extending from the base generally parallel to the first arm to a connection point at the second support axle plate.

4. The suspension system of claim 1 , wherein the upper arm assembly is comprised of a base pivotally connected to the upper pivot am, assembly and a first elongated arm extending from the base to a connection point at the first elongated arm of the lower arm assembly, and a second elongated arm extending from the base generally parallel to the first arm to a pivotal connection point at the second elongated arm of the lower arm assembly.

5. The suspension system of claim 1 , wherein the lower pivot arm assembly comprises a pair of angular brackets spaced apart and generally parallel to one another and having a shaft extending between first ends thereof for pivotal connection to the vehicle frame, and a shaft extending through second ends thereof for pivotal connection to the rear wheel support unit.

6. The suspension system of claim 1 , wherein the control arm is adjustable in length.

7. The suspension system of claim 3 , wherein the elongated arms of the upper arm assembly are adjustable in length.

8. The suspension system of claim 4 , wherein the elongated arms of the upper arm assembly are adjustable in length.

9. The suspension system of claim 2 , wherein the first and second elongated arms of the lower arm assembly are pivotally connected to the respective first and second axle plates.

10. The suspension system of claim 3 , wherein the first and second elongated arms of the upper arm assembly are pivotally connected to the respective first and second axle plates.

11. A rear suspension system for two-wheeled vehicles, comprising:

a lower pivot arm assembly pivotally connected to the vehicle frame;

a lower arm assembly including a base connected to the lower pivot arm assembly, and a first elongated arm extending from the base and including a connection point for the rear wheel, and a second elongated arm extending from the base generally parallel to the first arm and including a connection point for the rear wheel;

an upper pivot arm assembly pivotally connected to a frame of the vehicle;

an upper arm assembly including a base pivotally connected to the upper pivot arm assembly and a first elongated arm extending from the base to a connection point at the first elongated arm of the lower arm assembly, and a second elongated arm extending from the base generally parallel to the first arm to a pivotal connection point at the second elongated arm of the lower arm assembly;

a control am, having a first end thereof connected to the upper pivot arm assembly, and a generally opposite second end thereof connected to the lower pivot arm assembly;

a compressible shock unit connected at one end thereof to the frame and extending to either the upper or lower arm assembly or upper or lower pivot arm assembly at the opposite end thereof;

wherein the elongated arms of the upper arm assembly are adjustable in. length.

12. The suspension system of claim 11 , wherein the shock unit is pivotally connected to the vehicle frame.

13. The suspension system of claim 11 , wherein the shock unit is pivotally connected to the upper or lower arm assembly or upper or lower pivot arm assembly.

14. The suspension system of claim 11 , wherein the control arm is adjustable in length.

15. The suspension system of claim 11 , wherein the elongated arms of the lower arm assembly are adjustable in length.