Difference between revisions of "CM"
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[[File:1951 CM 125 cc 2 stroke.jpg|thumb|right|250px|'''1951 CM 125 cc 2 stroke''' [http://www.museoannicinquanta.it <small>Source</small>]]] | [[File:1951 CM 125 cc 2 stroke.jpg|thumb|right|250px|'''1951 CM 125 cc 2 stroke''' [http://www.museoannicinquanta.it <small>Source</small>]]] | ||
Latest revision as of 10:18, 5 July 2010
1930 - 1960
CM was founded in Bologna by Mario Cavedagna in 1930, and was a "craft" factory in the day. CM motors were virtually indestructible, able to offer superior performance to those of other engines of the time. The first bike was a 175 cc engine with a four-stroke vertical tubed head engine and transmission was a Burman with three speeds. In 1933, the first 500 cc, with a four-stroke engine valve head. In 1934 the first 250 cc with overhead camshaft.
From 1935 to 1940, is dedicated to the production of 250, 350 and 500 cc, in different versions, with a four-stroke engine valve head. During the war are in the list of 250 models, 350 and 500 cc. In 1947, leaves a new motorcycle, the Gheppio 250, with change to four-speed overhead camshaft. Alongside this, they list the 250 and 500 enduro bike named the Sparrowhawk and Gryphon, with a four-speed transmission and valve controlled by the head in auctions with the rockers. In 1949, he presents the first bikes with a two-stroke engine of 125 cc single-cylinder, chassis and an elastic telescopic front fork.
The real masterpiece, however, was a motorcycle in 1950 with two cylinders side by side with 250 cc. The engine was formed by housings the two cylinders, with the cranks at 180 °, the compression ratio was 6:1, and power of 9 hp at 5900 rpm. In 1956 was the introduction of the Francolino 175, a vertical single-cylinder, in head valves. In 1958, the company experimented in the scooter field, creating a 150 cc model for export alone. The engine had a single cylinder with two-stroke, but could not enter into production because the CM disappred from the market.
In 1964, CM is acquired by Mauro Negrini and manufactures motorcycles into the sixties but ended up closing soon after.
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