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 |
