| Attribute | BSA A 50 Royal Star 1965 × | BSA A 50 Royal Star 1964 × |
|---|---|---|
| General | ||
| Production from (year) | 1965 | 1964 |
| Make | BSA | BSA |
| Model | BSA A 50 Royal Star | BSA A 50 Royal Star |
| Category | Naked bike | Naked bike |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | Twin, four-stroke |
| Fuel system | Carburettor | Carburettor |
| Displacement (cm³) | 500 | 500 |
| Power (kw) | 24.1 | 24.1 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 65.5 | 65.5 |
| Stroke (mm) | 74 | 74 |
| Fuel control | Overhead Valves (OHV) | Overhead Valves (OHV) |
| Clutch | Wet multiplate | Wet multiplate |
| Compression | 7.5:1 | 7.5:1 |
| Chassis | ||
| Front suspension | Hydralic telescopic forks | Hydralic telescopic forks |
| Rear suspension | Twin shock | Twin shock |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Frame type | Single cradle | Single cradle |
| Front tyre | - | 3.25-18 |
| Rear tyre | - | 3.25-18 |
| Seat | Dual seat | Dual seat |
| Dimensions | ||
| Wheelbase (mm) | 1,391 | 1,391 |
| Performance | ||
| Fuel capacity (l) | 18 | 18 |