Manufactured 1985-1989
Joël Corroy built specialist observed trials machines engines in Vesoul from around 1984, and as demand increased he moved to larger premises in Santoche. Management transfered to Streit in 1987. In total over 400 trials motorcycles were constructed using engines from Tau, Moto Villa and GasGas. There were several twin-shock models, and a monoshock 323.
JCM displayed ten different machines at the 1989 Paris Salon.
JCM 323 1983 Trials
Engine
Air-cooled 2-stroke single. Bore x Stroke: 82 x 60 mm., 317 c.c. Power: 19 hp at 6500 rpm. Carburettor: Dellorto 27 mm. Six-speed gearbox. Cable-actuated clutch. Kickstart lever.
Chassis
Frame: cradle. Fork: Marzocchi. Rear suspension: OPS monoshock. Brakes: Front 120 mm drum. Rear 140 mm drum. Weight: 87.5 kg (wet). Fuel capacity: 5.5 litres
JCM 303 1986 Trials
Engine
Air-cooled 2-stroke single. Bore x Stroke: 82 x 58 mm., 303 c.c. Power: 18 hp at 5800 rpm. Carburettor: Dellorto 28 mm. Six-speed gearbox. Cable-actuated clutch. Kickstart lever.
Chassis
Frame: cradle. Fork: Floral 35 mm - travel 170 mm. Rear suspension: Corte-Cosso monoshock - travel 170 mm. Brakes: Front 120 mm drum, rear 140 mm drum. Weight: 92 kg (dry). Fuel capacity: 4 litres
JCM 125 Europa 1990 Trials
Engine
Air-cooled 2-stroke single. Bore x Stroke: 56 x 50.6 mm., 124.6 c.c. Power: 12 hp at 5800 rpm. Torque: 1.6 mkg at 4900 rpm. Carburettor: Dellorto 24 mm. Six-speed gearbox. Cable-actuated clutch. Kickstart lever.
Chassis
Frame: cradle. Fork: Marzocchi M1 - travel 180 mm. Rear suspension: Monopro Corte Cosso - travel 180 mm. Brakes: Front disc. Rear disc. Weight: 85 kg (dry). Fuel capacity: 3.8 litres
JCM 125 Oxygen 1990
Engine
Air-cooled 2-stroke single. Bore x Stroke: 56 x 50.6 mm., 124.6 c.c. Power: 12 hp at 5800 rpm. Torque: 1.6 mkg at 4900 rpm. Carburettor: Dellorto 24 mm. Six-speed gearbox. Cable-actuated clutch. Kickstart lever.
Chassis
Frame: cradle. Fork: Marzocchi M1 - travel 170 mm. Rear suspension: Monopro Corte Cosso - travel 180 mm. Brakes: Front disc. Rear drum. Weight: 90 kg (dry). Fuel capacity: 9 litres
JCM 240 Europa 1993 Trials
Engine
Air-cooled 2-stroke single. Bore x Stroke: 60 x 71.3 mm., 239 c.c. Carburettor: Dellorto 26 mm. Six-speed gearbox. Cable-actuated clutch. Kickstart lever.
Chassis
Frame: cradle. Fork: Marzocchi USD - travel 180 mm. Rear suspension: Boge monoshock - travel 180 mm. Brakes: Front disc, rear disc. Weight: 84 kg (wet).
Other JCM Models:
JCM 240 SR 1990 Trial 240 c.c.
JCM 240 TR 1985 Trial 240 c.c.
JCM 240 Trial 1989 Trial 240 c.c.
JCM 333 Vega 1987 Trial 333 c.c.
JCM 240 Vega 1989 Trial 240 c.c.
JCM 125 Weekend 1990 Trial 125 c.c.
JCM 240 Weekend 1991 Trial 240 c.c.
Sources: wikipedia.nl, retrotrials.com, François-Marie Dumas, Le Guide Vert, wikitrials.org.
