Photo ou archives : Ph. Horville
1806
JCM
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.
SPECIFICATIONS
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.