Girish Mahajan (Editor)

Matchless G9

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Production  1948–1958
Engine  498 cc air cooled twin
Successor  G12
Top speed  85 mph
Matchless G9
Manufacturer  Associated Motorcycles Plumstead, London
Transmission  Four speed gearbox to chain final drive

The Matchless G9 is a British motorcycle made by Associated Motorcycles at the former Matchless works in Plumstead, London. The G9 was finally discontinued with the introduction of the 646 cc Matchless G12 (and AJS Model 31) in the autumn of 1958.

Development

The Matchless G9 and corresponding AJS Model 20 were launched at the post war Earls Court motorcycle show in late 1948. Initially for export to the US, it was not until the late summer of 1949 that the first examples reached the home market. The styling was modern and the dual seat, megaphone silencers and bright chrome finish justified the name of Super Clubman for the matchless and Spring Twin for the AJS. The rest of the cycle parts were standard AMC, with the engine being housed in a pivoted fork frame with telescopic front forks. The basic design changed little over the course of the next few years, the most significant change being made in 1952 when a new Burman gearbox was adopted.

In 1951, the rear suspension was upgraded to the Jampot unit, derided for its shape in the 28 September issue of the Motor Cycle magazine. In the same year minor changes included a new Lucas horn-push on the handlebar and a medallion badge in place of the previously used transfer. Front fork shuttle damping was also replaced with rod and damper-type.

Progressively developed, the G9's twin-cylinder engine underwent a number of capacity increases, finally being discontinued with the introduction of the 646cc Matchless G12 (and AJS Model 31) in the autumn of 1958.

References

Matchless G9 Wikipedia


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