| MODEL | BSA M24 GOLD STAR 500 1938 - 1939 |
| Year | 1938 - 1939 |
| Engine Type | Four-stroke, single-cylinder, OHV, all-alloy |
| Displacement / Capacity | 498 cc / 30.4 cu in |
| Bore X Stroke | 82 x 94 mm |
| Compression Ratio | 7.75:1 |
| Cooling System | Air-cooled |
| Max Power | approx. 22 kW / 30 hp |
| Max Torque | — |
| Ignition | Lucas magdyno |
| Induction | — |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | Dry sump |
| Gear Box | 4-speed (Elektron cases) |
| Clutch | Multi-plate cush drive |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Reynolds 531 triangulated cradle |
| Front Suspension | Girder with quick-adjust shock absorbers and steering damper |
| Rear Suspension | None (spring-loaded saddle) |
| Front Brakes | Drum, 7.5 in |
| Rear Brakes | Drum, 7.5 in |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 724 mm / 28.5 in |
| Wheelbase | 1372 mm / 54 in |
| Ground Clearance | 121 mm / 4.75 in |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.00 x 20 in |
| Rear Tyre | 3.25 x 19 in |
| FUEL SYSTEM | |
| Fuel Capacity | 13.6 Litres / 3.6 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The first of the Gold Star line, derived from the Empire Star but lighter, with a Reynolds 531 frame, an all-alloy engine and a tank-top toolbox. Only a few hundred were built before the war stopped production, many of them for competition use.
