NSU Sportmax streamlined motorcycle, 250 cc class winner from the 1955 Grand Prix year Inside the 1950s, streamlining began to Participate in an ever-increasing aspect in the development of racing motorcycles as well as the "dustbin fairing" held out the potential of radical changes to motorcycle design. * Mandatory discipline. https://groups.google.com/g/motogiabao/c/clmvBbZFIl8