BSA A50 Royal Star: history, specs, pictures
| Manufacturer | BSA |
|---|---|
| Also called | A 50 Royal Star |
| Production | 1963 - 1970 |
| Engine | twin, four-stroke |
| Bore / Stroke | 65.5mm x 74.0mm |
| Top speed | 90 mph (145 km/h) |
| Horse Power | 32.32 HP (24.1 KW) @ 6500RPM |
| Fuel system | carburettor |
| Battery | 9.0:1 |
| Transmission | Gear box: 4-speed Final Drive: chain |
| Suspension | Front: hydralic telescopic forks Rear: twin shock |
| Brakes | Front: expanding brake Rear: expanding brake |
| Front Tire | 3.25-19 |
| Rear Tire | 3.50-19 |
| Wheelbase | 54.76 inches (1391 mm) |
| Weight | (dry), 178.0 kg (wet) |
| Fuel capacity | 3.96 Gallon (15.00 Liters) |
| Manuals | Service Manual |
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The BSA A50 Royal Star was a twin, four-stroke standard produced by BSA between 1963 and 1970. It could reach a top speed of 90 mph (145 km/h). Claimed horsepower was 32.32 HP (24.1 KW) @ 6500 RPM.
Engine
The engine was a air cooled twin, four-stroke. A 65.5mm bore x 74.0mm stroke result in a displacement of just 498.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).
Drive
The bike has a 4-speed transmission. Power was moderated via the wet multiplate.
Chassis
It came with a 3.25-19 front tire and a 3.50-19 rear tire. Stopping was achieved via expanding brake in the front and a expanding brake in the rear. The front suspension was a hydralic telescopic forks while the rear was equipped with a twin shock. The A50 Royal Star was fitted with a 3.96 Gallon (15.00 Liters) fuel tank. The wheelbase was 54.76 inches (1391 mm) long.