The BSA A7 Shooting Star motorcycle was produced from 1946 to 1961, starting as the A7 Star Twin before being renamed. The bike features a four-stroke twin-cylinder engine with a capacity of either 495cc or 497cc, depending on the year. It has an air-cooled cooling system, compression ratios varying between 6.6:1 and 7:2.1, and a maximum power output ranging from 19kW (26 hp) to 22kW (30 hp) at 5800 rpm. Other specs include a multi-plate, dry clutch, a 4-speed transmission with a chain final drive, and a twin cradle frame.
The front suspension is girder or telefork depending on the model, while the rear suspension is a swinging arm. The front and rear brakes are both 8 inches, while the wheels are steel with wire spokes. The fuel capacity is either 16 L (4.2 US gal) or 8 L (2.1 US gal), and the bike weighs 166 kg (366 lbs). The vehicle has a top speed of 137 km/h (85 mph) or 140 km/h (90 mph), depending on displacement. The BSA A7 Shooting Star motorcycle was primarily available in a bottle green/light green color scheme.
Technical specifications:
Make Model: Up to 1954: A7 Star Twin After 1954: A7 Shooting star
| Year | 1946 – 61 |
|---|---|
| Engine | Four stroke twin cylinder |
| Capacity | Up to 1950: 495 cc / 30.2 in. After 1950: 497 cc / 30.3 in/ |
| Bore x Stroke | 66 x 72.6mm |
| Cooling System | Air cooled |
| Compression Ratio | Star Twin: 6.6:1 Shooring Star: 7.2:1 |
| Oil Capacity | 2.6 L / 5.5 US pints |
| Carburetor | Up to 1954: Amal remote float type 6 After 1954: Amal 376 monobloc |
| Exhaust | Twin, chrome |
| Generator | Dynamo |
| Ignition | Lucas magneto |
| Spark plug | Star Twin: L10S Shooring Star: NA 10 |
| Battery | 12 V |
| Starting | Kick |
| Max Power | 495 cc: 19 kW / 26 hp @ 5800 rpm 497 cc: 22 kW / 30 hp @ 5800 rpm |
| Clutch | Multi-plate, dry |
| Transmission | 4-Speed |
| Final Drive | Chain, 98 links |
| Gear Ratios | 1st 13.62 / 2nd 9.28 / 3rd 6.38 / 4th 5.28:1 |
| Frame | Twin cradle |
| Wheelbase | 1391 mm / 54.8 in |
| Front Suspension | Star Twin: Girder Shooting Star: Telefork |
| Rear Suspension | Shooting Star: Swinging arm |
| Front Brakes | Shooting Star: 8 in |
| Rear Brakes | Shooting Star: 8 in |
| Wheels | Steel, wire spokes |
| Front Tyre | 3.25 x 19 in |
| Rear Tyre | 3.50 x 19 in |
| Dry Weight | 166 kg / 366 lbs |
| Fuel Capacity | 16 L / 4.2 US gal or 8 L / 2.1 US gal |
| Top speed | 495 cc: 137 km/h / 85 mph 497 cc: 40 km/h / 90 mph |
| Colours | Bottle green/Light green |
| Source | Wikipedia |
