AJS was the name used for cars and motorcycles made by the Wolverhampton, England, company A. J. Stevens & Co. Ltd, from 1909 to 1931, by then holding 117 motorcycle world records. After the firm was sold, the name continued to be used by Matchless, Associated Motorcycles and Norton-Villiers on four-stroke motorcycles till 1969, and since the name's resale in 1974, on lightweight, two-stroke scramblers and today on small-capacity roadsters and cruisers.

The English motorbike A.J.S. B1 was a typical sport model of the 20-ies. The price of a new motorbike comprised 85 pounds. The A.J.S. was the first one-stroke motorbike, which won Tourist Trophy in 1914. The motorbikes A.J.S. were produced by the brothers Steevens since 1911. In 1922 the company showed Standard Touring Model (B) and Standard Sporting Model (B1)