Sport · 1957
L25 Commodore
Technical Overview
1957 James L25 Commodore Technical Analysis & Specification Breakdown
Built around James's sport motorcycle platform, the 1957 James L25 Commodore relies on a 250 cc (15.3 cu in) air-cooled single cylinder, two-stroke powerplant. Internal engine geometry specifies a bore and stroke of 66.0 x 73.0 mm (2.6 x 2.9 inches).
Within MotoLibrary's James archive, this model family spans 6 indexed model years from 1957 to 1962, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Engine
Displacement 250.0 ccm (15.26 cubic inches)
Engine Type Single cylinder, two-stroke
Engine Details Single cylinder, two-stroke
Bore x Stroke 66.0 x 73.0 mm (2.6 x 2.9 inches)
Fuel System Carburettor
Cooling Air
Transmission
Final Drive Chain (final drive)
Performance
0-100 km/h 105.00 seconds
Chassis
Frame Type Steel
Front Suspension Telescopic
Rear Suspension Swinging arm-shocks-coil springs
Wheels & Brakes
Front Tyre 3.25-18
Rear Tyre 3.25-18
Front Brakes Expanding brake (drum brake)
Rear Brakes Expanding brake (drum brake)
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