Categories: BSA

BSA Bluestar (1932-51)

The BSA Bluestar was a line of motorcycles produced from 1932 to 1951 by the British motorcycle manufacturer BSA. The Bluestar came in three engine sizes: 250cc, 350cc, and 500cc. The specifications given are for the Bluestar 500 model which had a four-stroke, single cylinder, overhead valve engine with a 496cc capacity and a compression ratio of 9.5:1. The Bluestar had a wet sump lubrication system and used an Amal pump carburetor. The upswept twin exhaust pipes were made of steel and chrome. The Bluestar had a kick start and a three-speed transmission, with a top speed of 85mph. It had a multi-plate wet clutch and final drive was through a chain. The Bluestar had a wet weight of 162kg and was available in black with a chrome-plated tank and green panels.


Technical specifications:

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

Colours: Black frame, chrome plated tank with green panels

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