Founded by Mario Cavedagna and Oreste Drusiani1, the CM firm of Via Aglebert 22 Bologna developed a reputation for very reliable motorcycles well suited to competition work. The first machine was an OHV 175cc with a three-speed Burman gearbox, with their first serious heavyweight appearing in 1933, an OHV 500cc model. This was followed by an OHC 250 in 1934. The year up until 1940 saw the range expanded with 350cc machines, and several of these remained in production throughout the war.
In 1936 Astra machines were entirely manufactured by CM Bologna, according to the page on Astra history2.
In the late 1930s the factory had around 40 employees, of whom 10 were apprentices.
Mario Cavedagni died on November 14, 1940 and was succeeded by his wife Irma Ginepri, who led the C.M. firm through the difficulties of the war years assisted by loyal collaborators. She saved the workers' jobs, and hid precious motorcycles, machinery and stock from the ravages of the fascists.
The firm was one of the few permitted to continue production during the war - their output was mainly motocarri and similar utility three-wheelers, but of course they maintained development of the machines they were passionate about whilst they awaited the end of the fascist curse.
As a result of the efforts of Irma Ginepri the company was well-placed to resume production once Mussolini had seen justice provided by those who reviled him, his long-suffering countrymen.
Production of pre-war models resumed in late 1945, and new range of machines was revealed in the early postwar period with the bevel-drive OHC four-speed Gheppio 250 of 1947 along with three OHV models; the Rampichino 250, and Sparviero and Grifone 500s, all with 4 speed gearboxes. 3
1949 saw the introduction of their first lightweight (motoleggera) 125cc two-stroke with rear suspension and telescopic forks.
This was followed in 1950 by a 500cc twin with a 180 degree crank.
The beautiful Francolini OHV 175 appeared in 1956 along with its less sporty Centauro sibling.
The final design was a 150cc two-stroke scooter which did not enter production. The Italian motorcycle industry was in turmoil with many factories closing. CM, unfortunately, was another victim.
The assets of the company were purchased by Mauro Negrini.
Alfonso, son of Oreste Drusiani, founded Comet.
CM Models include:
CM 175 Turismo 1932
CM 175 Turismo 1933
Heavy duty lubrication lubrication with gear pump
Primary: chain drive
Multiple dry disk clutch
4-speed Burman, hand change
Final drive: Roller chain
Tyres: 3.00x19
Brakes: Expansion lateral
Electrical system: Lucas 6 Volt headlight, tail light, horn, dynamo, battery
Maximum speed km/h 85
CM 250 Lusso 1934
CM 250 Sport 1934
CM 500 Lusso 1935
Tyres: 3.50x19
Brakes: Expansion lateral
Electrical system with Bosch headlight, tail light, horn, dynamo, ammeter, battery 6 Volt
Maximum speed 130 km/h
CM 500 Sport 1935
CM 350 Super Sport 1935
CM 250 SZ 1935
CM 350 Turismo 1935
CM 350 AB 1937
Other models:
1931 175cc Type GD 70A Normale OHV.
1932 175cc Turismo OHV twin-port.
1933 175cc Turismo OHV single port 4 speed gearbox.
1949-1955 125cc
1949-1953 SS 250cc
1950-1953 160cc
1950-1953 250cc Bicilindrica 2T
1956 Centauro 175cc Monoalbero 4T
1956 175cc Francolini 4T
1950s Motocarri
Sources: Henshaw, motoclub-tingavert.it, Musei Patrimonio Industriale
Enrico Ruffini and Antonio Campigotto have written a history of C.M., published by Giorgio Nada Editore. Moto Bolognesi C.M.
Notes
1. It is likely that CM also used Astra engines.
2. An article from Museo del Patrimonio Industriale speaks of the Laurenti brothers and Alfonso Drusiani, rather than Oreste Drusiani.
3. Gheppio 250 (Kestrel), Sparviero 500 (Sparrow Hawk), Grifone 500 (Griffon).
Fri Dec 04 2009
lyndemotorsports at yahoodot com
CM Three Wheeler motocarro
CM Motocarro
Still needing any service manuals or books
Vermont
Tue Jun 28 2005
cofranzk1 at virgilio.it
CM italian motorcycles
devo restaurare una CM 125 del 49 cerco foto o letteratura
Wed Apr 20 2005
lyndemtc at sover.net
cm motorcycles
I have a CM motorcycle (actually a three wheeler) and need any service
literature available.
Thanks
Stan
December 18, 2002
CM Motorcycles And Literature Wanted: I am interested in finding anything
on these bikes, especially the 125 and 250 two-strokes of the '50's. Also,
I have a limited selection of literature which I will gladly share with
others.
Bill Hooben, whh at post dot com
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