In October 1930, went into production AJS 7 R motorcycle, with its speed to 160 km/h, was used Denli and Beyksrom in order to break the record in the class of 350cc to race in Montleri. A new design by Phil Walker, the chain-driven overhead camshaft 7R had the history of the pre-war AJS singles behind it. Initially, the AJS R7 was not as powerful as its competitors, producing 32 bhp(24 kW) @ 7500 rpm.

The motorcycle is a 1927 AJS Big Port 500cc racer, complete with pannier petrol tanks bolted together, and an auxiliary oil pump on the separate oil tank.

Introduced in 1952, the AJS E95 (AJS Porcupine) motorcycle was a much-redesigned version of the E90 horizontal twin, knows as the Porcupine due to the spiky finning on the cylinder head. The original design was drawn pre-war when supercharging was legal, but when racing resumed post war, supercharging was banned and the Porcupine was uncompetitive.

The alterations included a 3-speed gearbox and enclosed chain drive. The AJS model D moto was given a 6h.p. V-twin engine and a sidecar version was introduced.

The AJS Supercharged V-four 500cc motorcycle was launched in 1935, initially as a roadster. It had chain-driven single overhead cams, front-mounted supercharger. Initially air-cooled, it became liquid-cooled in 1939, adding to its reliability.