Editing AJS (section)

== AJS two-strokes and Norton road racer ==

From 1962 Cotton motorcycles were the main customer for 250 Starmaker engines. The 250 Starmaker engines were used in the Cotton Cobra scrambler and the Telstar Racer. Cotton therefore was very involved in the development of the Starmaker engine..

Peter Inchely formerly from Ariel and BSA was involved with the 250 Road Race project. Inchley rode a Bultaco-based 6-speed, 250 Villiers Starmaker-powered special to 3rd place in the 1966 Lightweight TT. Several pre production AJS 250 Racers were built and raced but the project came to halt in 1967 after an unsuccessful second TT attempt. The scrambles project continued with considerable success.

From 1966 to 1968, Villiers developed the "Stormer" Motocross motorcycle. In 1968 Malcolm Davis won the British 250 Championship on a pre Stormer, Y4 scrambler.

In late 1967, a special project was undertaken with the Stormer. Four bikes were built at Marston Road,{{Citation needed|date=September 2009}} all equipped with spark arrestors on the end of the tailpipe and with a rudimentary lighting system. Three of them had 250&nbsp;cc engines and were badged as AJS machines. The fourth one had the "360" engine (actually only 334&nbsp;cc) and was badged as a Matchless. This bike was probably the last one built with a Matchless badge and the only [[two-stroke]] Matchless. The four bikes were taken on by members of the Royal Air Force motor Sports Association and entered in the 1968 International Six-Days Trial.

The [[two-stroke]] AJSs had been built in Wolverhampton, at the Villiers factory but in 1970 the UK government provided a special subsidy that enabled AJS to open a new factory on Walworth Industrial Estate in Andover, where they assembled Stormer off-road motorcycles. The competition department was located next to the famous race track at [[Thruxton, Hampshire|Thruxton]], [[Andover, Hampshire|Andover]].

AJS scramblers were produced from 1968 until 1974 in 250, 370 and 410 guises. The early 250 was designated the Y4. In 1969 The 370 (Y5) was added and the name changed to Stormer. The 410 followed in 1972.

A little known about motorcycle was the 37AT Trials bike which was partially built by Cotton Motorcycles using some AJS parts and Villiers's 37A engine.

By 1974, Norton Villiers was having financial trouble, and the rights to manufacture the Stormer under the AJS banner were purchased. In September 1974 the business was moved to [[Goodworth Clatford]] near [[Andover, Hampshire|Andover]]. Initially selling spare parts for existing motorcycles, the business expanded to produce complete motorcycles still using the Starmaker-based engines under the FB-AJS name.

The Starmaker/Stormer four-speed engine was becoming outdated and could not compete with the new arrivals from manufacturers such as Husqvarna, CZ and later, scrambles bikes from Maico, Suzuki, Honda, Kawasaki and Yamaha.

From 1974 Stormer-based scrambles and trail bikes were sold from modified AJS stock. Keeping the model updated until 1980.
During the early 1980s off-road and trail bike with Austrian Rotax engines of 250&nbsp;cc, 410&nbsp;cc and 495&nbsp;cc were produced.