Itom Motorcycles

The History of ITOM

Itom Logo

by Franco Bonadonna

The Itom factory was founded in Turin by lawyer Corrado Corradi, and began production in 1948 at Via Francesco Millio.

Their first product was an auxiliary bicycle engine (3 versions - one for front wheel - 2 for rear wheel - close to pedals or over the rear wheel)

1950 - produced the first ciclomotore with tubular frame and automatic clutch; this was soon followed with a two-speed version.

1953 - introduction of the Esperia, which had a 2 speed gearbox and a pressed steel monocoche (Italian: monoscocca) frame.

1954 - first Astor Sport (3 speed, handle-bar gearshift controls) and pedals (obligatory)

1957 - Astor Super Sport and Competizione ; the Competizione achieved 75 Kph. These had pedals and two type of forks (see picture). Itom sold a tuning kit for competition use comprising high compression cylinder head, chrome bore cylinder, Dell' Orto SS20 carburettor, expansion chamber and piston. The pistons were of various types with either 2 or 3 rings.

At the end of the 1950s the ITOM parent company was renamed I.M.S.A. (Industria Meccanica Sant'Ambrogio), having moved in 1957/58 to the factory of the former Maglificio Fratelli Bosio. In 1957/58 the factory moved to the premises of the former Maglificio Fratelli Bosio and the ITOM parent company was renamed I.M.S.A. (Industria Meccanica Sant'Ambrogio). In 1965 about 130 people worked in ITOM

The last competition models tuned with this kit were capable of 110 Kph, unfaired!

Also available as an option were Ceriani competition forks with external springs. These were fitted as standard production by 1965.

1959 - Italian laws change: pedals cease to be mandatory and were removed from domestic sports models. The export models retain pedals for those markets where required.

1959 - Tabor model introduced. The 65cc machine is the only Itom model with number plate (50cc bikes in Italy are exempt). 3 speed gearbox, carburettor 16 mm, B/S 45x40 mm, 3.5 HP, 70 Kph.

1963 - Competizione ceases production. The Super Sport is top of the range of the sports models, with 4 speeds and handlebar gearchange.

1965 - Astor 4M, the most famous of all Itom motorcycles. 4 speed with foot change gearlever, Dell' Orto UA18S carburettor, 5.5 - 6 HP at 10.000 rpm and 95-97 Kmh. White frame. Yellow tool-boxes, mudguards, chainguard, fuel tank (with white flashes and black or green lines)

1968 - Gear selector repositioned on the left side. Square shaped head and barrel with larger fins.

1969 - Sirio Cross off-road model introduced with Astor 4M engine but carburettor UB20S. Black frame, chromed mudguards, blue fuel tank (later: white frame, red fuel-tank). Soon after the Sirio was introduced another off-road model named simply Cross (Fuori Strada) appeared - it was slightly detuned, using a UA16S carburettor and had black and orange trim (see picture).

1969 - Astor has yellow & white (or sometimes red & white) colour scheme - the "Shark" fuel tank is a single colour without the flashes seen on earlier models.

1970 - New frame for Astor 4M: double cradle instead of large central tube.

1972 - Sprint introduced. It is the last sport model, and the Astor is dropped. It runs a Zanetti engine with head and cylinder from the Astor. The angular fuel tank is painted in monochromatic apple green with logo ITOM in white block letters. (Alas, no more the beautiful globe and laurel garland logo.)

1973 - Itom ceases production of their own engines and adopt Franco Morini engines for the whole range. Itom is no longer a real manufacturer, but more an assembler of motorcycles.

1973 - New range presented in December at the Milan Motor Show includes two 125cc models. one a street-scrambler with F.Morini engine, the other named Cross Competition with a Zundapp unit, but both remain prototypes. All 50 production models now have Franco Morini engines.

1975 - End of production: The venture into medical compressors and water-heaters was a financial disaster and the losses led to the closure of the motorcycle division.

Note: All the Itom engines were 40x39.5 = 49.5cc, with the sole exception of the Tabor, 65cc 45x40mm.

All models were the work of the engineer Giuseppe Spotto who was a fighter pilot during WWII. Silvano Bonetto was his right hand man.


Itom participated in competition from late 1950 through to 1969 with race-tuned Astor models ridden by Sergio Bongiovanni and, later, Domenico De Giorgi. Other Astors were campaigned by Tooleys in England, the Itom importers, and also by dealers and importers in Holland, Belgium, France and Germany. Itoms won many championships in Europe in those years.

In 1966 Sergio Bongiovanni was Italian Champion of “Montagna”, hill-climbs.

In 1970 a new model appeared; branded Itom but produced by brothers Francesco and Walter Villa, it had rotary disc valve induction. This machine won many races, and placed 2nd in the Seniores Italian Champioship 50 cc. Ridden by Otello Buscherini and Claudio Lusuardi. This was the swan-song for Itom.

Riders who contributed to the illustrious history of the diminutive Itom include Mike Hailwood, Bill Ivy, Dave Simmonds and the first woman to ride solo in the TT, Beryl Swain.

Article supplied by Franco Bonadonna originally published in Motociclismo. (Edited December 2019)

Wed Jul 18 2007
jjphuket at yahoodot com
ex world champion
itom 50cc
you have forgotten the ex world champion bill ivy raced itoms at brands hatch for his local shop chisolms
Sat Jul 21 2007
Maidstone Kent
Many thanks for putting bill ivy up he was a really nice lad, maidstone was famous for racers and one very famous guy married a local girl whose brother was a great racer lets test yous memory who else appart from bill ivy was a winner many thanks if you can help any info on gilera,s

Hmm... I think you're probably referring to the late, great Hailwood, yes? What did you want to know about Gilera?No mate your right Hailwood was a great, but if you look at the records i think you will find Barry Sheene one of the greats was married to Paul Smarts sister, they was caravan owners his dads name was Harry Smart from Farliegh just outside of Maidstone, a great old boy we all remember Pauls big win and if im right he,s involved with Ducatis come back as for gilera, just wonder if theres a club or any out there for sale it was a great bike then jj.

Suggest starting at somewhere like the Classic Italian Club

and also browsing the Gilera section of Bikelinks - I'm pretty sure someone's making replicas of the fours, and that site will be listed: