Italian Motorcycles

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Moto GD - GD Ghirardi Motorcycles


Manufactured 1923-1938 in viale Aldini, Bologna

Fabbrica Italiana Motocicli GD was founded by Guido Dall'Oglio and the brothers Gherardo and Mario Ghirardi.

The GD machines soon became recognised for their excellent performance, taking the 125cc one kilometre world record in 1924. That year, works rider Mario Cavedagni finished second to his team mate Renato Sceti in the 1924 Italian Championship, and did well the following year at the GP des Nations. Cavedagni won most of the races he entered over the next three years. Other GD 125 Corsa riders won the German GP and the Italian Championship in '25, so the radios and sports pages were blaring the marque's name all across Europe.

In 1925, Gherardo Ghirardi and Dall'Oglio both left the company, the latter forming the Dall'Oglio marque.

In 1926 GD were building 5 different versions of their horizontal twostroke, one of which they raced at the Monza Grand Prix. Manufacture was decentralised to a degree, using a variety of suppliers to produce their components; Laurenti for engines, Labanti for tanks, and Stanzani for forks.

These engines were supplied to Gaia of Turin, and likely to other manufacturers.

The following year they introduced a 4-speed 250cc vertical twin, and 1930 saw the introduction of 175cc and 350cc four-stroke models. Mario Cavedagni had left GD to form CM with Oreste Drusiani, and the 175 was supplied to CM who sold it as the GD70.

Included in the range were light two-strokes of 100cc. Production appears to have halted in 1931, and restarted in 1935, initially with motocarro and in 1938 a 250cc version of the previous 175, using a CM engine. With war looming, GD ceased motorcycle manufacture and joined forces with weapons manufacturer Beretta.

Control of the firm passed to cousins ​​Enzo and Ariosto Seragnoli in 1942 who, in addition to producing war material, built the Ursus three-wheeler.

In 2012, G.D had over 2,500 employees and twelve international branches.

Bibliography: Moto G.D. - L' Aquila a due tempi by Enrico Ruffini

Sources: motoclubstoricoconti.it, museibologna.it, wikipedia.nl, moto-collection.org, Biblioteca Salaborsa, correspondence.

Moto GD Models

GD Stella 1923

Engine: Horizontal two-stroke single. Bore 51, stroke 60 mm, capacity 122.5 cc
Ignition: flywheel magneto
Carburettor: Zenith
Lubrication: petrol-oil mix
Transmission: Direct to the wheel by belt
Frame: simple cradle in steel tube
Maximum speed: 45 km/h

GD Corsa Alfa R2 125cc 1926

Engine: two-stroke single with ball and roller bearings. Bore 51, stroke 60 mm, capacity 122.5 cc
Ignition: Bosch magneto with manual advance
Carburettor: Amac
Lubrication: petrol-oil mixture
Fuel tank: 10 litres
Primary transmission: gears
Gearbox: 2-speed
Final drive: chain
Chassis: Simple cradle, steel tubes
Wheels: tyres 26x2
Maximum speed: km/h 80-85

This machine was very successful in the late 1920s with the likes of well-known racers Baschieri, Bernardoni, Rossetti, Sandri, Tenni and others frequently gaining the podium.

GD 175cc CM Turismo 1929
Engine: single-cylinder vertical 2-stroke. Bore 58, stroke 65, capacity 171.6 cc
Ignition: Bosch magneto
Carburettor: Gurtner
Lubrication: petrol-oil mixture
Primary transmission: gears
Gearbox: 3-speed
Final drive: chain
Chassis: Open cradle, tubular steel
Wheels: 25x3 tyres
Maximum speed: 75-80 km/h

This machine was introduced in response to the new regulations which came in to force the previous year.

GD 70 A Normale 1931
OHV vertical single-cylinder with cast iron barrel and head, single exhaust port. Bore 58.5, stroke 64.0. Capacity 171.9cc. V
Ignition: Bosch magneto
Carburettor: GA 16 (replace by Amac on some surviving examples)
Dry sump, Best & Lloyd oil pump
Primary: chain drive in steel chaincase.
Multiple dry disk clutch
Three-speed Burman gearbox
Final drive: chain
Frame: steel tube
Front suspension: parallelogram
Tyres: 3.25x19
Brakes: Expansion lateral
Maximum speed 85 km/h

Thu Mar 11 2010
mmoss62<at>gmaildot com
GD Motorcycles
GD any
I am an American looking for a GD motorcycle, any help with this would be appreciated. Any condition
Richmond, Va USA

Mon Jun 19 2006
rocom at dnet.it
Motore moto gd 175 bicilindrico
Vendo motore gd bicilindrico del 1927?

Wed Oct 26 2005
prima.ribica at siol.net
moto GD
Hello, I have one of the moto GD. Where I can find spare parts for it? I am from Slovenia
Thank you, Matej

Thank you for your fast work. I have two pictures of that moto. You can see, that the reservoar and front light are not original. I dont know of other parts. The frame is a litle bit modyfied. I have the book Moto GD l'aquila a due tempi. From that book i think that it may be tipo Monza  - modelo S.S.1 on the page 77.

Thank you, Matej

January 17th 2005
There is a superb book on Moto GD by Enrico Ruffini
Moto G.D. - L' Aquila a due tempi
ISBN: 88-7911-042-X

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