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 Terrot - NSSO 2
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Terrot D2-492-72-19
Photo ou archives : F-M. Dumas

Capacity : 500
Model : NSSO 2
Production : 1930 -
Category : (R) Street Bike


500 NSSO 2 - 1929

Return to the big league

Terrot returned to the 500cc category in 1927, following Monet-Goyon, the leading French constructor. Terrot again challenged Dollar and Gnome & Rhône, but overhauled Alcyon, Motobécane and Peugeot. A rapid evolution from a flat-tank to a saddle-tank followed. In the summer of 1929, one of the best 500s of the period was produced – the NSSO 2.

Back in Business

Terrot, which had been a leading manufacturer in 1914, was reduced to a shadow in 1919 since its property had been sequestered during WWI. After the war, the Dijon-based firm could only offer a skeleton range: in 1924 three small two-stroke models of 270, 175 and 147cc. The firm 's renaissance really began in 1927, with the arrival of 250 and 350cc four-strokes, but what was still lacking was a 500.

Rapid Update

This was achieved in 1927, with the 500 JAP-engined Model. However, this had an outdated cycle part with an unfashionable flat-tank. Terror's return as a front-rank manufacturer was heralded by the saddle-tank 500s, whose top model was the NSSO 2. For this 500, Terrot took the best elements of its 350 which had become Champion of France: a robust frame, an elegant saddle-tank, a gearbox with a four-point attachment to the frame guaranteeing perfect chain alignment and Druid type forks with limited travel. All that was missing was the powerful AYA front brake – but that was so expensive that Terrot had decided not to use it. In compensation, the JAP engine made this a lively and reliable 500.


Engine: 489cc (85.5x85mm) air-cooled single-cylinder four-stroke; tortal-loss lubrication

Power Rating: 18 hp @ 4500 rpm

Valves: overhead

Fuel System: Amal carburetor

Transmission: close-ratio 3-speed, chain final drive

Suspension: Druid girder forks (front); rigid (rear)

Brakes: 6.7 inch drum (front); 8.25 inch drum (rear)

Wheels: 700x100mm balloon tires (from & rear)

Weight: 331 lb

Maximum Speed: 78 mph

Handsome but costly, the Terrot NSSO 2 was the peak of the 1920s range.

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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