BSA A7 Shooting Star (1946-61)

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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

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