BSA A7
1948 BSA A7, with rigid rear end | |
| Manufacturer | BSA |
|---|---|
| Production | 1946–1962 |
| Assembly | Small Heath, Birmingham England |
| Successor | BSA A50 |
| Engine | 495 and 497 cc (30.2 and 30.3 cu in) straight twin |
| Bore / stroke | 495: 62 mm × 82 mm (2.4 in × 3.2 in) 497: 66 mm × 72.6 mm (2.60 in × 2.86 in) |
| Top speed | 85 mph (137 km/h) (495) 90 mph (140 km/h) (497) |
| Power | 26 bhp (19 kW) (495) 30 bhp (22 kW) @ 5800 rpm (497) |
| Ignition type | Magneto |
| Transmission | Duplex primary chain to 4-speed gearbox, bolted to rear of crankcase Single-row primary chain to separate 4-speed gearbox (swinging arm models) |
| Frame type | Rigid Plunger Half-duplex cradle |
| Wheelbase | 1,391 mm (54.75 in) |
| Weight | 166 kilograms (366 lb) (dry) |
| Fuel capacity | 3.5 imp gal (16 L) |
The BSA A7 is a range of 500cc parallel-twin engined motorcycles that was made by Birmingham Small Arms Company (BSA) at its factory in Armoury Road, Small Heath, Birmingham. The range was launched in 1946 with a 495 cc (30.2 cu in) long-stroke engine. An improved 497 cc (30.3 cu in) version based on the BSA A10 engine was launched in 1950. Various A7 models continued in production with minor modifications until 1961–62, when the unit construction A50 model superseded them.