During 1945 to 1966, AJs motorbikes produced the Model 18 which was referred to as AJs 500cc Model 18 as well as AJs Model 18s. Sold under the AMC, Associated Motor Cycles name, they were a big hit for British buyers. While these motorbikes have not been made in well over 50 years, proud owners are able to refer to an AJs Model 18 workshop manual to keep these historical bikes in great shape. Today, they are scattered all over the world.
AJs Model 18 was also referred to as “The Statesman” during the mid 1960’s due to its popularity among British state fighters.
When the Model 18 was originally developed, it came directly from a 1930’s design. Even 30 years after its original debut, it was still able to mimic its original design. In 1949, the AJs Model 18 underwent a significant update in which a springer frame rear suspension was made available to the market. This update is when the AJs Model 18 became the Model 18S. The suspension upgrade gave the motorbike a significant improvement on the rear end, making for a steadier ride. The shocks were also replaced due to leaks and went on to be replaced by larger Jampot shocks in 1951.
Throughout the course of the AJs Model 18, it underwent three model changes, all of which were also seen as upgrades. After the first initial AJs Model 18, the second model was released in 1951. It was produced for a total of four years and was referred to as the 500 cc long stroke AJs 18CS. When 1956 rolled around, the shorter stroke took over which included larger bore models that used the same numeric codes as the 1951 long stroke.
The bore of the earlier models were 82.5 mm but from 1956 until 1966 when production ended, models had a bore closer to 86 mm. The C in the AJs 18CS stood for competition and S for suspension. Production of the AJs Model 18 ended in 1966 due to AMC’s merge with Norton.
For almost 20 years, AJs Model 18 was a popular choice for motor bike enthusiasts. The transmission was a 4-speed AMC gearbox to final drive chain with a wheelbase of 140 cm and a height of 76 cm. The fuel capacity of this motor bike was 3 gallons which at the time was quite large. Today, the AJs Model 18 can still be found in European countries.