The Compensator is required to absorb the torsional vibration generated by the engine.

A big V twin in particular doesn't deliver it's torque evenly, but in unequally spaced peaks as each cylinder fires.

In most industrial applications the Centa type coupling, as used on the Morgan, is subject to continuous uni-directional loading. In these cases an element of backlash isn't of consequence. Obviously on a car this is not the case.

Any clearance or backlash in the coupling will result in increased shock loading as the load through the coupling is reversed i.e when the wheels drive the engine (Aero owners will be familiar with the "shunt" on such occasions)

This will result in increased wear rates on the rubber elements.

The coupling on the Morgan appears to be of a more basic Centa design and more suited to coupling electric motors to pumps etc.

Centa make more sophisticated models with zero backlash and elements that can be exchanged in situ.

In my opinion the Centa coupling fitted to the M3W is not suited to it's application.

Last edited by mph; 31/07/17 10:55 AM.