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 Terrot - proto SEP
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Terrot D2-492-40-08
Photo ou archives : F-M. Dumas

Capacity : 125
Model : proto SEP
Production : 1945 - 1946
Category : (R) Street Bike


Prototype SEP 125cc - 1947

Always a prototype

After five years' interruption due to the German Occupation during WWII, the 1946 Paris Motorcycle Salon wasn't a show for buying or selling, but a showcase for the industry. It gave the French a chance to see the shape of two-wheelers to come.

"EP" for Edmond Padovani

Terrot of Dijon unveiled its new "EP" lightweight, a 125cc development of a 98cc prototype of 1939, created by Edmond Padovani of the in-house design department. It had a unit-constructed overhead-valve powerplant in a conventional cradle frame, with girder front forks.

Just a Styling Exercise

This Motorette went into production in 1947. At the second postwar Paris show, it was exhibited alongside the SEP, a prototype with a double cradle frame, plunger rear suspension and a fuel tank incorporating a toolbox. The only feature which actually made production was its rear suspension, adjustable for solo or two-up use, which ultimately equipped the RGST 500. After years of inactivity, Terrot suddenly sprang to life in 1957, with its new Fleuron-Tournoi-Ténor-Rallye range. The old SEP was dusted off and updated with modern components-streamlined front fork, heavily-domed front and back mudguards, and an engine from the new Tenace, the utility model from the new range. Though the new SEP was now right up to date in appearance, it still remained a styling exercise that never made production.


Engine: 123cc (52x58mm) air-cooled single-cylinder four-stroke; flywheel magneto ignition

Power Rating: 6.5 hp @ 5500 rpm

Valves: overhead

Fuel System: carburetor

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

Suspension: telescopic forks (front); adjustable plunger (rear)

Brakes: drum (from & rear)

Wheels: wire (front & rear)

Weight: 176 lb

Maximum Speed: 47 mph

Unveiled as a utility autobike in 1917, the SEP prototype was brought up to date with new engine, mudguards and engine ten years later, but still remained a prototype.

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.

© Tous droits réservés
François-Marie Dumas

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