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The Ducati Singles were single cylinder motorcycles, made by Ducati from 1950 to 1974. Chief Engineer Fabio Taglioni developed a desmodromic valve system in these years, a system that opens and closes the valves using the camshaft, without the need for valve springs. This valve system has become a trademark feature of Ducati motorcycles.
Contents
1 The Singles (1950 - 1973)
1.1 Cucciolo
1.2 OHV pushrod singles
1.3 Ducati 65 TS and Cruiser
1.4 OHC 98cc Gran Sport
1.5 125 Desmo Ducati
1.6 Ducati Diana Mark 3 Super Sport
1.7 Two-strokes
1.8 1965 Ducati 350 Sebring
1.9 Production Desmo
2 Sources
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The Singles (1950 - 1973)
In 1926, the brothers Adriano and Marcello Ducati founded Societa Scientifica Radio Brevetti Ducati, a company in Bologna producing tubes, condensers and other radio components.[1] On June 1, 1935, the cornerstone of a factory in Borgo Panigale was laid. By 1940, the company was engaged in the manufacture of electronic equipment for the military, making the factory a target for Allied bombing. The Ducati factory at Borgo Panigale was hit badly more than once, but maintained production.[2]
Cucciolo

1950 Ducati Vilar Cucciolo
Main article: Ducati Cucciolo
During World War II, Ducati developed a small engine mounted on a bicycle, called the Cucciolo ("little puppy") and in 1950 began producing its own complete 98-pound motorcycle with the same name.
OHV pushrod singles
From the mid-1950s through mid 1960's Ducati produced non-Taglioni-designed OHV singles with conventional pushrod valve operation, such as the 125 Bronco.
Ducati 65 TS and Cruiser
The market was moving though, towards bigger motorcycles and Ducati's IRI management felt diversification was the only answer. Ducati made an impression at the early 1952 Milan Show, introducing the Ducati 65 TS cycle and the Cruiser, the world's first four-stroke scooter. Despite being described as the most interesting new machine at the 1952 show, the Cruiser was not a great success. A couple of thousand were made over a two year period before being withdrawn from production.
In 1953, management decided to split the operation into two separate entities, Ducati Meccanica SpA, and Ducati Elettronica SpA, under separate management. Dr. Giuseppe Montano took over as head of Ducati Meccanica SpA and the old Borgo Panigale factory was modernized, with government assistance.[3]
By 1954, Ducati Meccanica SpA was producing 120 bikes a day, but cheap cars were entering the markets, and sales for many motorcycle manufacturers would decline.
OHC 98cc Gran Sport
Ducati's single overhead-cam 98cc Gran Sport, designed by Taglioni, became the blueprint for all future Ducati singles. It had an air-cooled cylinder inclined forward 10 degrees from vertical, gear primary drive, wet-sump lubrication, battery ignition and camshaft drive by vertical shaft and bevel gears. This bike came to dominate its class in Italian racing. In 1956 there was a dohc 125cc version of the Gran Sport.
In spite of being a government appointed director, Montano was a motorcycle enthusiast and under his direction, Ducati's competitive activities grew. Fabio Taglioni was chief designer and technical director of Ducati from 1954 to 1989, serving longer than many of the managements that were to follow. The company soon developed a full-fledged racing team. Italians were avid racing fans and would buy bikes built by winners. To acquire a competitive image Ducati needed to race successfully. Taglioni鎶� usual development procedure was to test a motorcycle on the racetrack before releasing it to the public.
125 Desmo Ducati
The high rpm's needed to produce competitive power in a small engine generated valve float, which Taglioni believed could be overcome with a desmodromic cylinder head. The 125 Grand Prix could produce 16hp at 11,500rpm, its true rev limit, while the Desmo could crank out 19hp at 12,500rpm and could 鎼抋fely (bottom end permitting) rev further to 15,000. Big-end life was short at these sorts of revs and new crankshaft bearings were put in for every race.
Desmodromics, were used in the W196 Mercedes-Benz straight-eight Desmo engines that dominated early formula 1 racing. When Mercedes retired from racing, it retired the Mercedes desmo technology, never using it in production models. Taglioni applied it successfully to Ducati motorcycles. As usual, Desmo technology was used first in racing Ducatis and then in Ducati street machines.
The 125 Desmo Ducati won its first race at the 1956 Swedish G.P. at Hedemora, lapping all the other cycles, but then its rider, Gianni Degli Antoni, died during the practice for the next race, the Italian G.P. of Monza. That death dealt a severe blow to the Ducati racing program and it was not until 1958 that their team was able...(and so on)