El magneto era conducido a través de una corona dentada en el extremo de un eje que en la parte inferior engranaba con los piñones de distribución, lo que lo hacía efectivo y silencioso.
Valve side of the 90° b h.p. twin-cylinder P. and M. engine, showing Claudel carburettor.
The magneto was driven through a ring gear on the end of an shaft that in the lower part meshed with the distribution pinions, which made it effective and silent.

Credit: The MotorCycle