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Guzzi's 2nd attempt at a 500cc 4 cylinder GP bike was first shown at the Italian GP in 1952. The design was done outside the factory by Carlo Gianini (who was responsible for the original motor that eventually became the Gilera 500/4) and featured an unusual, longitudinally mounted inline four cylinder motor which was initially fitted with a mechanical/pneumatic fuel injection system. Final drive was by a shaft. While fast the bike suffered from being overly complex, having a high centre of gravity and a difficult gear change due to the shaft drive. The riders didn't like the bike and it only achieved two victories, both in non championship races. Carburettors replaced the injection system for 1954 as well as a dustbin fairing that incorporated pannier fuel tanks. This bike is fitted with the original fairing and carburettors. 55hp at 9,000rpm. Top speed of 230kph. Weight 145kg. Photographed in Northern Italy. 2013.