4 valves topped by an overhead camshaft, dual ignition, oversquare bore / stroke ratio. These are technical solutions that we are quite familiar with today, and they are the same ones that Carlo Guzzi adopted 100 years ago for the first Moto Guzzi prototype: the GP 500. It was born in Giorgio Ripamonti’s workshop in Mandello, thanks to the time spent and the headaches caused during the repair of the problematic motorcycles of that era, to the experience in aeronautics and to the financing of Giorgio Parodi’s father. It would ultimately not be mass-produced, but remains today a clear statement of intent.