Gilera - VTe Gran Sport Otto buloni
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Gilera D2-492-60-04
Photo ou archives : F-M. Dumas

Capacity : 500
Model : VTe Gran Sport Otto buloni
Production : 1939 -
Category : (R) Street Bike


500 VTE Gran Sport / "Otto Buloni" - 1939

Eight studs for victory

In 1938, Gilera made a brilliant showing on the track with its four-cylinder Rondine. But the marque had not forgotten its singles and entrusted engineer Giuseppe Salmaggi with the design of the 500 Saturno. It was derived from the 1935 500 VT, known as the "Quattro Buloni," from the number of studs fixing the cylinder to the crankcase.

Start of the Line

This 500, with its overhead-valves and single exhaust, incorporated the main characteristics of the future Saturno. At its heart was a semi-unit-construction engine with duplex chain primary transmission and with four speeds selected by a right-hand pedal.

Choice of Frames

The oil reservoir was cast integrally with the lower crankcase, and there was a choice of frames. One had a rigid rear end; the other was fitted with the famous Gilera swing arm suspension in which levers acted against twin horizontal springs mounted beneath the saddle. The VT developed rapidly, becoming known as the "Otto Buloni" because the cylinder was held down by eight studs. The VTE "Grand Sport" appeared in 1939. It was modified in many details; the most noticeable was the increased size of the fins on the cylinder casting. This enclosed the vertical tube containing the pushrods and the oil pipes. The suspension was lightened, ignition was by magneto and a rev-counter was optional. The Gran Sport distinguished itself in national races. The same year, it was joined by the 93 mph "Special," built according to the Sport Formula, with a new gearbox.


Engine: 499cc (84x90mm) air-cooled single-cylinder four-stroke

Power Rating: 24 hp @ 4,800 rpm

Valves: overhead

Fuel System: 28.5 mm Dell'Orto carburetor

Transmission: 4-speed, chain final drive

Suspension: girder forks (front); swing arm with coil springs and friction dampers (rear)

Brakes: drum (front & rear)

Wheels: 3.25 inch (front & rear)

Weight: 441 lb

Maximum Speed: 84 mph

The extremely modern "Otto Buloni" enjoyed many sport successes, representing the start of a motorcycling legend.

Motorcycle encyclopedia Moto Passion, realised by François-Marie Dumas, include almost 2000 photos presented with an exhaustive history of the motorcycles exhibited.

This unique collection has been realised with the participation of many specialists. With many thanks in particular to Yves Campion, Michael Dregni, Didier Ganneau, Jean Goyard, Helmut Krackowizer, Michel Montange, Christian Rey, Bernard Salvat, Mick Woollett, etc

One can order here

  • Original cards on paper (in french)
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François-Marie Dumas

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