1970 BSA A 50 Royal Star

1970 BSA A 50 Royal Star Specifications

  • Updated: 2023-03-20

General information

ModelBSA A 50 Royal Star

Engine and transmission

Displacement498.0 ccm (30.39 cubic inches)
Engine typeTwin, four-stroke
Power33.0 HP (24.1 kW) @ 6500 RPM
Top speed145.0 km/h (90.1 mph)
Bore x stroke65.5 x 74.0 mm (2.6 x 2.9 inches)
Valves per cylinder2
Fuel controlOverhead Valves (OHV)
Cooling systemAir
Transmission typeChain (final drive)

Chassis, suspension, brakes and wheels

Front tire3.25-19
Rear tire3.50-19
Front brakesExpanding brake
Rear brakesExpanding brake
Weight incl. oil, gas, etc178.0 kg (392.4 pounds)
Fuel capacity15.00 litres (3.96 US gallons)
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