A cush drive is a feature in a

motorcycle A motorcycle (motorbike, bike, or trike (if three-wheeled)) is a two or three-wheeled motor vehicle steered by a handlebar. Motorcycle design varies greatly to suit a range of different purposes: long-distance travel, commuting, cruising ...

or scooter drive-train that is designed to reduce stress on drivetrain components during gear or throttle changes. A common design used by almost all street motorcycles has three major pieces: the wheel, the sprocket assembly, and a rubber damper system between the wheel and sprocket. The rubber damper system typically consists of rubber blocks that damp the transfer of force between metal components and effectively reduces wear and fatigue of the metal components. Another popular system incorporates metallic compression type

coil spring A selection of conical coil springs The most common type of spring is the coil spring, which is made out of a long piece of metal that is wound around itself. Coil springs were in use in Roman times, evidence of this can be found in bronze Fib ...

s placed between the input and output shafts of the cush drive assembly. The cush drive was invented by Royal Enfield in 1912 for use on their 425cc V-twin.

References

Motorcycle transmissions {{Motorcycle-stub