Antonio Roma “Portús” converted a Cota 330 2-stroke engine of 327cc to a 4-stroke of 360cc while preserving the original crankcases. This unique prototype, weighing just 95kg, appeared in various competitions.
Photographed at the Museu Moto Bassella Montesa Cota Exhibition by Mike Ricketts.

Montesa Cota Observed Trials Motorcycles