Manufactured in Italy just prior to World War I, the Aetos was powered by a 492cc 3.5 hp V-twin engine. [1]
Gilera is an Italian motorcycle manufacturer founded in Arcore in 1909 by Giuseppe Gilera (1887–1971). In 1969, the company was purchased by Piaggio.
Bimota is an Italian manufacturer of custom and production motorcycles. It was founded in 1973 in Rimini by Valerio Bianchi, Giuseppe Morri, and Massimo Tamburini. The company name is a portmanteau derived from the first two letters of each of the three founders' surnames: Bianchi, Morri, and Tamburini.
Cagiva is an Italian motorcycle manufacturer. It was founded in 1950 by Giovanni Castiglioni in Varese, originally producing small metal components. Giovanni's sons, Claudio and Gianfranco Castiglioni, went into the motorcycle industry in 1978. The name is a portmanteau derived from the founder's name 'Giovanni Castiglioni' and the founding location, i.e. Castiglioni Giovanni Varese.
Malossi S.p.A. is an Italian manufacturer of tuning parts for mopeds and scooters. It was founded by Armando Malossi in 1930.
Garelli Motorcycles is an Italian moped and motorcycle manufacturer. It was founded in 1919 by Adalberto Garelli.
Polini S.p.A. is an Italian manufacturer of tuning parts for motorcycles, mopeds, and scooters. Among other products, they produce cylinders and variators for both racing and road use. They also produce pocket bikes with 50cc up to 15 hp.

Marzocchi is an Italian manufacturer founded in 1949 by brothers Stefano and Guglielmo Marzocchi. The company profile doesn't include hydraulic industrial pumps anymore but only suspension components for motorcycles and bicycles. The Marzocchi Pompe is still in the hands of the Marzocchi Family and produces gear pumps and motors in Bologna.
MBP Morbidelli was an Italian motorcycle manufacturer now is mbp morbidelli founded by Giancarlo Morbidelli in Pesaro. During the late 1970s and early 1980s, the company was particularly successful in Grand Prix motorcycle racing. The team won the 125 cc world championship in 1975, 1976 and 1977, and won the 250 cc championship in 1977.
Ducati Energia SpA is an Italian company based in Bologna, part of the Ducati group, which produces electrical and electronic components.
Ghezzi & Brian is an Italian motorcycle engineering firm and manufacturer based in Missaglia.
A. Fusi & Co., S.p.A. Milano (1932–1957) is an historic brand of motorcycles.
Arrow Special Parts is an Italian motorcycle exhaust system manufacturer founded in 1985.
MAS was an Italian motorcycle manufacturer from 1920 until 1956.
Frera is a historic brand of motorcycles, which were produced in Tradate. Until the late 1920s Frera was one of the leading Italian motor brands. The factory finally closed in 1936. In Tradate there is today a museum dedicated to this brand.
Ceriani, formerly Arces, was an Italian company that designed and fabricated motorcycle frames and suspensions. The company was founded by Arturo Ceriani in 1951. Arces is an acronym derived from Arturo Ceriani S.r.l.
Paton is an Italian motorcycle manufacturer. In 1957 after FB Mondial pulled out of Grand Prix racing, Paton was set up by Giuseppe Pattoni and designer Lino Tonti.

Borile makes retro-modern bicycles and motorcycles in Padova, Italy, such as the B500CR, "a modern day interpretation of how a BSA Gold Star would look if it were produced today." Borile's technically advanced yet aesthetically vintage motorcycles are at the center of a marked retro wave during the first decade of the 21st century. Early Boriles were handmade, limited-production creations, but later models are mass-produced.
Agrati was an Italian motorcycle company who built scooters and mopeds between 1958 and 1965. In 1961 Agrati was merged with Garelli Motorcycles, and from 1965 all bikes were produced under the Garelli name.
AIM motorcycles were sports machines built in Italy between 1974 and 1982 using 49cc and 124cc Sachs and Franco Morini two-stroke engines.
Alato was an Italian motorcycle manufacturer from 1923 to 1925. Established by brothers Filio and Giulio Gosio in Turin, the Alato was powered by a 131cc two-stroke engine.