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Long Stroke A7 1946 - 1950 |
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original Herbert Perkins designed A7 is rare today. Most left Britain's
shores as part of the country's post-war export drive.
The long stroke title refers to its distinctly pre-WWII influenced 62 x 82mm engine dimensions - much modernised when Bert Hopwood updated the engine for 1951. A 7:1 compression ratio and a single Amal 276 15/16in bore carburettor, make the Perkins A7 a mild mannered delight. The rigid frame gives a pre-war feel but the telescopic fork, combined with a well sprung single saddle, combine to give a comfortable enough ride. Opinions differ on the reliability of the engine. Cam wear can be excessive due to inadequate oiling. Gear change is imprecise. Worth owning as the original BSA twin. A well preserved survivor will not be expensive - if you can find one.
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 Original A7 twin (1946-1950) is rare today. Long stroke, low compression engine makes this Herbert Perkins designed twin a mild mannered delight. |
