A vehicle developed for trial racing, in which it enjoyed considerable success. Its styling was very similar to that of the standard models, except for a larger fuel tank, wrapround leg shield and a larger right side sack to house the carburettor on the cylinder. It earned its name by competing in the 26th International 6-Day event of 1951, at which it won nine gold medals. The Piaggio racing team was composed by: Biasci, Cau, Granchi, Mazzoncini, Merlo, Nesti, Opessi, Riva, Romano and Vivaldi.

In 1951 the Vespa 125 Sei Giorni also won the Motorcycle Italian Federation Trophy, which saw the victories of three Italian riders on the Vespa (Giuseppe Cau, Miro Riva, Bruno Romano).

TECHNICAL SPECIFICATIONS

2-stroke single cylinder engine

Bore: 54 mm - Stroke: 54 mm - Displacement: 124.2 cc

Top speed: 95 km/h

Suspension: elastic, with coil spring on the front wheel, elastic with coil spring and hydraulic damper on the rear wheel

Brakes: cast iron drums with large cooling fins

Tyres: Pirelli racing 3.50-8"