BSA Bluestar

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BSA Bluestar

Make Model	BSA Bluestar 250 cc, 350 cc and 500 cc (Specifications that follow is for the Bluestar 500)
Year	1932 - 51
Engine	Four stroke, single cylinder, OHV, 2 valve
Capacity	496 cc / 30.3 cub in.
Cooling System	Air cooled
Compression Ratio	9.5:1
Lubrication	Wet sump
Carburetor	Amal, pump
Exhaust	Twin, upswept, steel, chrome
Starting	Kick
Max Power	40 kW / 54 hp @ 4500 rpm
Clutch	Multi-plate, wet, cable operated
Transmission	3 Speed
Final Drive	Chain
Wet Weight	162 kg / 358 lbs
Top Speed	137km/h / 85mph

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. 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).
BSA pre war tank logo.jpg

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 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.

"250 Bluestar"

"350 Bluestar"