BSA Blue Star
British single cylinder motorcycle, produced by BSA in the 1930s
The BSA Blue Star is a British motorcycle made by BSA at their factory in Small Heath, Birmingham. The Blue Star range was produced between 1932 and 1936. In 1936 a slightly uprated sports version called the BSA Empire Star was launched with the Blue Star remaining in the model range and called the “New Blue Star, Q21”. The Blue Star became known for its reliability and handling. In 1937 an entirely new engine designed by Val Page featured in the Empire Star and the Blue Star was dropped from the range. The Empire Star developed into the famous Gold Star in 1938 (also known as the M24).
The B33-3 O.H.V. 249cc Blue Star was called the Blue Star Junior and the R33-5 348cc O.H.V. Blue Star was known as the Sporting Blue Star. It was the W33-8 (Q21 in 1936) 499cc O.H.V. that became the most popular, however, and led to the development of the Gold Star. It was known as the "sea beezer" and it was BSAs fifth best seller.
Begin with the source’s own compact description: “BSA Blue Star” is british single cylinder motorcycle, produced by BSA in the 1930s. The dossier treats that line as a proposition to test through Blue, Star and British, not as a finished interpretation.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 29, 2025. The linked authority identifier is Q4836524. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1932, 1936, 1937 and 1938.
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This entry incorporates text from “BSA Blue Star” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.