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A vibration-isolation system for assembly of a motorcycle frame with an engine/transmission unit has a first pivotal mount at a rear portion of the frame and engine/transmission unit, the first mount comprising all rigid bearing components mounted to solid elements of both the frame and the engine/t

A vibration-isolation system for assembly of a motorcycle frame with an engine/transmission unit has a first pivotal mount at a rear portion of the frame and engine/transmission unit, the first mount comprising all rigid bearing components mounted to solid elements of both the frame and the engine/transmission unit, the first mount thereby allowing the engine/transmission unit to rotate around the first mount in substantially a vertical plane of the frame, but allowing no pivotal movement in any other plane or any translation movement in any direction relative to the frame; and a second mount at a front portion of the frame and engine/transmission unit, the second mount incorporating one or more elastomeric elements between a solid interface to the frame and a solid interface to the engine/transmission unit, thereby allowing substantially vertical translation of the engine transmission unit relative to the frame at the second mount, the translation of an amplitude limited by the elastomeric elements, and thereby limiting the rotation of the engine/transmission unit around the first pivotal mount.

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A vibration-isolation system for assembly of a motorcycle frame with an engine/transmission unit has a first pivotal mount at a rear portion of the frame and engine/transmission unit, the first mount comprising all rigid bearing components mounted to solid elements of both the frame and the engine/t

A vibration-isolation system for assembly of a motorcycle frame with an engine/transmission unit has a first pivotal mount at a rear portion of the frame and engine/transmission unit, the first mount comprising all rigid bearing components mounted to solid elements of both the frame and the engine/transmission unit, the first mount thereby allowing the engine/transmission unit to rotate around the first mount in substantially a vertical plane of the frame, but allowing no pivotal movement in any other plane or any translation movement in any direction relative to the frame; and a second mount at a front portion of the frame and engine/transmission unit, the second mount incorporating one or more elastomeric elements between a solid interface to the frame and a solid interface to the engine/transmission unit, thereby allowing substantially vertical translation of the engine transmission unit relative to the frame at the second mount, the translation of an amplitude limited by the elastomeric elements, and thereby limiting the rotation of the engine/transmission unit around the first pivotal mount. . The device of claim 1, wherein the switch structure is a slip clutch for alternately engaging the winding structure and the rocking structure. 3. The device of claim 1, wherein a far end of the rod is eccentrically mounted to the wheel axle extension and wherein a forward end of the rod is sufficiently less eccentrically mounted to the spring structure to assure the reciprocating motion of the rod. 4. The device of claim 1, wherein the switch structure is a slip clutch for alternately engaging the winding structure and the rocking structure and wherein a far end of the rod is eccentrically mounted to the wheel axle extension and wherein a forward end of the rod is sufficiently less eccentrically mounted to the spring structure to assure the reciprocating motion of the rod. 5. The device of claim 1, wherein the winding structure comprises a connecting rod, a first end of the connecting rod eccentrically mounted to the spring structure and a second end of the connecting rod sufficiently equally eccentrically mounted to the wheel axle extension such that the forward movement of the stroller winds the spring structure. 6. The device of claim 1, wherein the rod has rack teeth on a far end of an underside of the rod and wherein said rack teeth are adapted to engage a pinion gear attached to the wheel axle extension. 7. The device of claim 1, wherein the switch structure is connected to the spring structure. 8. In a stroller having a stroller frame member, at least three stroller wheels and at least one wheel axle extension associated with at least one stroller wheel, a device for automatically rocking the stroller, comprising: a spring structure mounted on the stroller frame member, the spring structure including overwinding prevention structure for preventing overwinding of the spring structure, a winding structure extending from the wheel axle extension to the spring structure, said winding structure causing a forward winding of the spring structure upon a forward movement of the wheel axle extension, a rocking structure, including a rod mounted to the wheel axle extension, that converts an unwinding of the spring structure into a reciprocating motion of the rod, said reciprocating motion of the rod causing the wheel axle extension to alternately move forward and backward, a switch structure for switching between an activation of the winding structure during the forward movement of the stroller and an activation of the rocking structure when the stroller is stationary and a user desires to rock the stroller, said device causing the stroller to rock forward and backward upon engagement of the rocking structure after a forward movement of the stroller. 9. In a stroller having a frame member, at least three stroller wheels and at least one wheel axle extension, a device for automatically rocking the stroller, comprising: at least one of the stroller wheels comprising a rocking wheel, said rocking wheel mounted on a rocking wheel axle that extends outward from the rocking wheel, a spring structure attached to a frame member of the stroller, said spring structure including overwinding prevention structure for preventing overwinding of the spring structure, the spring structure including a shaft running through a center of the spring structure, a first rod attached to the shaft and including a lever, the lever capable of assuming a plurality of lever positions, a second rod, a first end of the second rod mounted on an outer end of the lever and thereby eccentrically mounted to the spring structure, a degree of eccentricity of a mounting of the second rod to the spring structure being adjustable by movement of the lever to a selected position among the plurality of lever positions, a far end of the second rod being eccentrically mounted to the rocking wheel, the plurality of lever positions including an outer position selected to wind the spring structure when the stroller is moving forward and an inner position select ed to rock the stroller when the stroller is stationary, when the lever is in the outer position, a rotational distance traveled by the first end of the second rod being approximately equal to a rotational distance traveled by the far end of the second rod, and when the lever is in the inner position, the rotational distance of the first end of the second rod having a sufficiently smaller radius than a second radius of an arc traveled by the far end of the second rod that an unwinding of the spring structure will cause a reciprocating motion by the second rod and thereby rock the rocking wheel and the stroller. 10. The device of claim 9, wherein the first rod has one end attached to the shaft, the first rod also includes a jacket and the lever is telescoped within and projects from the jacket, the plurality of lever positions measuring a degree to which the lever is telescoped within the jacket. 11. The device of claim 9, wherein the lever includes a handle mounted thereon by means of a handle shaft. 12. A stroller that can be automatically rocked, comprising: a stroller frame, the stroller frame including a stroller frame member, at least three stroller wheels, at least one wheel axle extension associated with at least one stroller wheel, a spring structure mounted on the stroller frame member, a winding structure extending from the wheel axle extension to the spring structure, said winding structure causing a forward winding of the spring structure upon a forward movement of the wheel axle extension, a rocking structure, including a rod mounted to the wheel axle extension, that converts an unwinding of the spring structure into a reciprocating motion of the rod, said reciprocating motion of the rod causing the wheel axle extension to alternately move forward and backward, a switch structure for switching between an activation of the winding structure during the forward movement of the stroller and an activation of the rocking structure when the stroller is stationary and a user desires to rock the stroller, the switch structure including overwinding prevention structure for preventing overwinding of the spring structure, said stroller rocking forward and backward upon engagement of the rocking structure after a forward movement of the stroller. 13. The stroller of claim 12, wherein the switch structure is a slip clutch for alternately engaging the winding structure and the rocking structure. 14. The stroller of claim 12, wherein a far end of the rod is eccentrically mounted to the wheel axle extension and wherein a forward end of the rod is sufficiently less eccentrically mounted to the spring structure to assure the reciprocating motion of the rod. 15. The stroller of claim 12, wherein the switch structure is a slip clutch for alternately engaging the winding structure and the rocking structure and wherein a far end of the rod is eccentrically mounted to the wheel axle extension and wherein a forward end of the rod is sufficiently less eccentrically mounted to the spring structure to assure the reciprocating motion of the rod. 16. The stroller of claim 12, wherein the winding structure comprises a connecting rod, a first end of the connecting rod eccentrically mounted to the spring structure and a second end of the connecting rod sufficiently equally eccentrically mounted to the wheel axle extension such that the forward movement of the stroller winds the spring structure. 17. The stroller of claim 12, wherein the rod has rack teeth on a far end of an underside of the rod and wherein said rack teeth are adapted to engage a pinion gear attached to the wheel axle extension. 18. The stroller of claim 12, wherein the switch structure is connected to the spring structure. 19. A stroller that can be automatically rocked, comprising: a stroller frame, the stroller frame including a stroller frame member, at least three stroller wheels, at least one wheel axle extension associated with at least one stroller whe