The name came from the participation at the 26th International Six Days in 1951, where 9 gold medals were won. The Piaggio Racing Team was composed of: Biasci, Cau, Crabs, Mazzoncini, Merlo, Nesti, Opesso, Riva, Romano and Vivaldi. The Vespa 125 "Six Days" also won the trophy of the Italian Motorcycle Federation in 1951, which saw 3 riders dominate on Italian Vespas (Giuseppe Cau, Miro Riva, Bruno Romano).
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