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 Terrot - 125 proto SEP
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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.

Le fichier Moto Passion réalisé par François-Marie Dumas réunit près de deux mille photos accompagnées d'un historique très complet des machines présentées.
Il sera progressivement mis à jour ici et toute information complémentaire est la bienvenue sur info@moto-collection.org.

Cette documentation unique, qui constitue sans doute l'encyclopédie la plus exhaustive jamais écrite sur l'histoire de la moto, a été réalisée avec l'assistance de nombreux spécialistes dont principalement Didier Ganneau, Christophe Gaime, Mick Woollett, Jean Goyard, Bernard Salvat, Christian Rey, Yves Campion, Helmut Krackowizer, Michael Dregni, Michel Montange, etc. que je remercie ici.

Disponible sur demande :
- Les fiches originales sur papier
- Les photos et archives signées de mon nom en haute définition ou les documents originaux.
Me contacter sur info@moto-collection.org pour les conditions et droits d'utilisation.