 | |
| Manufacturer | BSA |
|---|---|
| Also called | A50, Star, Star Twin |
| Production | 1962-1970 |
| Predecessor | BSA A7 |
| Successor | BSA B50 |
| Engine | 498cc air cooled twin |
| Power | 33bhp @ 5800 RPM |
| Transmission | four speed gearbox to chain drive |
| Wheelbase | 54.75 inches (139.1 cm) |
| Dimensions | L: 81 inches (210 cm) W: 11.7 inches (30 cm) |
| Fuel capacity | 4 gallons |
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The BSA Royal Star was a Birmingham Small Arms Company (BSA) motorcycle whose new engine design paved the way for a range of successful unit construction twins. As well as giving a clean look to the engine, with the pushrod passages part of the cylinder block casting, unit construction reduced the number of places oil could leak from.