1989 JCM SR 250
1989 JCM SR 250
Modern trials machine
In 1983 Joel Corroy, a motorcycle dealer from Vesoul, 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 development. From the start, the JCM proved extremely competitive.
A Difficult Beginning
There’s a vast gulf fixed between creating a prototype and putting it into production. 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. Furthermore, at that time 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: 239cc (71.3×60nm) water cooled single-cylinder
Power Rating: 19 hp @ 6000 rpm
Valves: two-stroke; automatic inlet valves
Fuel System: carburetor
Transmission: 6-speed; chain final drive
Suspension: telescopic forks (front); swinging arm (rear)
Brakes: Brembo disks (front & rear)
Wheels: tubeless tires; 2.75×21 inch (front); 400×18 inch (rear)
Weight: 190 lb
Despite its excellent performance, the JCM SR250 was unable to make headway against the competition in the close-knit world of trials riding.
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