Quadrant Big Single 654cc 1922

Quadrant was one of the earliest British motorcycle manufacturers, established in Birmingham in 1901. Famous for their big singles, Quadrant pioneered many innovations that proved important for motorcycle development but struggled after the First World War and the company was wound up in 1928.

The first model, equipped with the very popular Minerva clip-on engine, appeared in 1901.
A few years later  a famous long-distance rider by the name of Tom Silver was contracted by the company.
He attracted a lot of publicity in the years to come by getting excellent results in long distance events and in 1907 he became  managing director of the firm.
Although several types of engines were experimented with, Quadrants were best known for their big singles; in the early twenties even a 780 cc single with unit-construction gearbox was marketed.

Introduced in 1922 was a side valve 490cc single (bore 70mm, stroke 100mm), earlier models having a side exhaust, and rear inlet valve. In 1924 two models were offered, the 490 cc side-valve and a hefty 654 cc side-valve with bore and stroke of 87x110. In 1922 the big single model were offered, as all chain solo and all chain combination modell for sidecar use.

In 1922 Quadrant's London agent Clifford Wilson entered the International Six Days trial on his 654cc Quadrant, he got a gold medal, and best in class.

The machines has a 3-speed Sturmey Archer gearbox, Amac carburetter, Best-Lloyd oil drip feed, EIC Magneto and full lightning acethylene equipment. 

This high quality Quadrant solo has been restored to a high level with great care for detail and was used in the past 10 years on vintage events.