|Engine||Competition (alloy) 350cc Single-cylinder|
The post war AJS 350 heavyweight single and its Matchless equivalent, could both trace their ancestry back to the war time G3L so beloved of despatch riders which with a change of livery from khaki to black enamel formed the basis for AMC's immediate post war production. For the 1949 season AMC introduced the option of pivoted fork frame to the home market and for 1951 an alloy cylinder head replaced the iron item previously employed and the (in)famous "Jampots" made their appearance, the next major amendment to effect the appearance of the machine occurred in 1954 when full width alloy hubs replaced the single sided units previously employed. 1956 saw the introduction of the restyled toolbox and oil tank. The combination of the new oil tank, Jampot suspension units and full width alloy hubs, which was only available for the 1956 model season is considered by many to be the most attractive version of AMC's heavyweight single.