What is the engine displacement of the 1923 AJS 6 Bigport?

The 1923 AJS 6 Bigport has an engine displacement of 349.0 ccm (21.30 cubic inches).

1923 AJS 6 Bigport Price, Specs, Review

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Review

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The 1923 AJS 6 Bigport represents a fascinating glimpse into motorcycling's early days. Powered by a 349cc single-cylinder engine, this machine would have offered a compelling blend of performance and usability for the time. The 3-speed gearbox, a relatively advanced feature for the era, would have allowed riders to make the most of the available power. Ergonomics would have been typical of the period, with an upright riding position and minimal instrumentation. Stopping power came from an expanding drum brake at the front, a technology that, while rudimentary by modern standards, was state-of-the-art for the early 1920s. The target rider for the 1923 AJS 6 Bigport would have been someone seeking reliable and capable transportation. This motorcycle provided a viable alternative to public transport or the horse and carriage, offering a sense of freedom and adventure that was just beginning to define the motorcycling experience.

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License Class (EU)

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Rule of thumb: under 125cc / 15HP → A1, under 47HP → A2, above → A.

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Fuel Economy & Running Costs

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Estimated average for 349cc class: 45-60 mpg (4.0-5.5 L/100km)

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Insurance Class

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Insurance grouping for AJS 6 Bigport (349cc):