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 JCM - 240 trial
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Photo ou archives : Ph. Horville

Capacity : 240
Model : trial
Production : 1984 -
Category : (Off-Road) Trial


SR 250-1989

Modern trials machine 100% french made

In 1983 joel Corroy, a motorcycle dealer from Vésoul in center of France, founded his JCM marque. A keen trials rider and brilliant engineer, he had conceived a modern trials machine, with progressive single-damper rear suspension, a potent Italian Tau engine and a compact frame that was highly amenable to the best level of development. From the start, the JCM proved extremely competitive.

A Difficult Beginning

There's a vast gulf fixed berween creating a prototype and putting it into produclion. Joel Corroy burned up a vast amount of money, energy and hope. The lack of competent subcontractors in the French motorcycle business saw jCM run out of funds. Joel

Corroy then became associated with Streif, a major local automotive supplier who bought the JCM business in 1987.

Ten-Model Range

Now JCM had adequate funds and the backing of the CAO industrial group. At the

1989 Paris Salon, the marque displayed a fine range of ten models with its own-make

engines, available in three capacities and four stages of tune. Unfortunately, the commercial results didn't equal the large amount of money invested. Furthennore. at that lime the competition unleashed a wave of high-tech features to which even the flagship SR250 model was unable to respond. The punishment was grim: from 1990, JCM was condemned to assemble to order, using its own frames with Spanish Gas-Gas engines.


Engine: 2)9cc (71.3x60mm) water-cooled single-cylinder

Power Rating: 19 hp@ 6000 rpm

Valves: two-stroke; automatic inlet valves

Fuel System: carburetor

Transmission: 6-specd; chain final drive

Suspension: telescopic forks (front); swinging arm (rear)

Brakes: 13rembo disks (front & rear)

Wheels: tubeless tires; 2.75x21 inch (front); 400x18 inch (rear)

Weight: 190 lb


Despite its excellent performance, the ]CM SR250 was unable to make headway against the competition in the close-knit world of trials riding.


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.