The Ducati Diana, known as the Ducati Daytona in the UK, is a 249 cc (15.2 cu in) single cylinder bevel drive SOHC motorcycle produced by the Italian manufacturer Ducati from 1961 to 1964. It was the sports version of Ducati's first 250 cc road bike. It was replaced in 1962 by the higher performance Ducati Diana Mark 3 in the US and by the Ducati Mach 1 in Europe in September 1964.