Today in Motorcycle History

Symplex Motorcycles

Symplex motorcycles were produced at Alma Street, Birmingham between 1914 and 1915

1914 The name first appeared in December 1914, on a machine that was probably intended to offer basic transport during the early days of World War I. The engine was a 318cc Dalm two-stroke and the model had two speeds or direct belt drive and Brampton Biflex forks. Like so many other makes of the era, it was very short lived.


THE Symplex two-stroke has many attractive features, and should prove a very popular model. The engine, which has a bore and stroke of 73x76 mm. (318 c.c), is of the four-port type. The crankshaft is of large diameter (7/8 in.), running in white metal bearings, and the piston is fitted with three rings. The U.H. magneto is placed on a platform cast with the crank case, and is chain driven. The lubrication is by the petroil system, or by direct feed to the cylinder wall, whence the oil runs to the main bearings. The spring forks are Brampton's Bi-flex. The tank is capable of holding one and a quarter gallons of petrol and two pints of oil. Hutchinson 26 x 2in. tyres are fitted, and a really comfortable saddle, viz., Brooks B180. The carburetter is an Amac.

The two-speed model is fitted with the Albion two-speed gear box, also, a three-speed gear and clutch can be supplied at an extra cost. The makers are the Symplex Motor Cycle Co., 150, Alma Street, Birmingham.

The Motor Cycle, December 17th, 1914.

Sources: Graces Guide, The Motor Cycle

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