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http://hydro-carbons.blogspot.in/2012/05/1937-dkw-ure-250.html In 1928 a two-stroke, single-cylinder DKW 175 with supercharger won in its class at the Italian Grand Prix. The motorcycle, ridden by Geiss, generated 11 h.p. at 5,000 r.p.m., putting it at least on a par with Tonino Benelli's unbeatable Benelli 175.
Three years later Zoller, the DKW designer and racing manager, set out to prove that the two-stroke engine was just as good as any other kind. In order to make his idea a reality he followed two paths: He organized the most impressive racing team that had been seen in Europe, and he built a brand-new engine that was revolutionary in being a two-stroke two-cylinder with supercharging by means of a cylinder pus.

1957 Caproni-Trento Capriolo Sport 75cc Motorcycle | Vintage Motorcycles 1957 Capriolo Sport 75cc Motorcycle - Capriolo Motorcycles were manufactured by Aero Caproni of Trentino, Italy