ABC Motor Cycle, 1921

A.B.C. 3 hp motor cycle, registration number FC 3511, with one registration book, 1921

In the history of motorcycling, certain designs of an advanced technical nature have appeared well before their time but have failed to come into quantity production. A typical example is the A.B.C, motorcycle designed by Granville Bradshaw in 1919. This technically progressive motorcycle incorporates an independent front and rear suspension system using leaf springing, an opposed twin-cylinder engine with a four-speed integral gearbox mounted in a cradle frame.

The engine has a bore of 69mm. and a stroke of 54mm. providing a capacity of 398 c.c. The overhead valves are set at an angle to one another in a hemispherical combustion chamber. A Claudel-Hobson carburettor and a dynamo system for lighting are provided.