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 Benelli - 4T SS elastico
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Benelli D2-492-58-01
Photo ou archives : F-M. Dumas

Capacity : 250
Model : 4T SS elastico
Production : 1941 -
Category : (R) Racing


250 Tipo 4 T-SS Elastico – 1941

Unmatched endurance

In the early 1930s, Benelli became one of the Italian "Big Five," alongside Bianchi, Garelli, Gilera and Moto Guzzi. In 1934, its renowned overhead-camshaft 175 was uprated to 250cc and given a four-speed gearbox. Of the six models making up the 250 range, the 4 T-SS was the most sought after. This model had been developed for endurance races such as the Milan-Taranto, with a large fuel tank and maximum weight saving, as shown by the heavily-drilled brake drums and anchorages.

Aluminum Power Unit

A wonderfully typical Benelli product, the 4 T-SS had a power unit that differed from the other versions in the range in having a single exhaust pipe and aluminum cylinder and head instead of twin exhausts and cast-iron cylinder/head construction. There was a little oil radiator mounted in front of the lubricant oil tank on the fore part of the crankcase.

Refined Suspension Layout

On its right side, a cruciform polished alloy casing concealed the gear-train drives for the overhead-camshaft, lighting dynamo and rear-mounted magneto. Another specialty of Italian bikes in general — and Benelli in particular — was the rear suspension, offered as an option on all Benellis in 1936. Despite its appearance, it was a swing arm unit, not plunger springing. The sturdy rear frame triangle acted as a guide and rigid support for a lightweight swing arm unit consisting of two springs inside tubes linked to radius arms and friction dampers.


Engine: 246cc (67x70mm) air-cooled single-cylinder four-stroke; dry-sump lubrication

Power Rating: 20 hp @ 8,000 rpm

Valves: overhead-camshaft driven by gear train

Fuel System: carburettor

Transmission: Benelli 4-speed foot-shift, chain final drive

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

Brakes: drum (front & rear)

Wheels: 20 inch (front & rear)

Weight: 309 lb

Maximum Speed: 93 mph

The 4 T-SS E, a 1941 4 TN, with cast-iron head and twin exhausts

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)
  • High resolution scans or original documents presented and signed with my name.

Please contact me at for conditions and copyright.

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François-Marie Dumas

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