(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"
Any corrections or more information on these motorcycles will be kindly appreciated.