| MODEL | BSA B30 250 1930 |
| Year | 1930 |
| Engine Type | Four-stroke, single cylinder, OHV |
| Displacement / Capacity | 249 cc / 15.2 cu in |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | Air cooled |
| Max Power | — |
| Max Torque | — |
| Ignition | 6 V Magdyno |
| Induction | Amal carburettor |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | Dry sump |
| Gear Box | 3-speed manual |
| Clutch | Multi-plate with integral cush drive |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | — |
The 1930 quarter-litre overhead-valve BSA, with dry-sump lubrication, a magdyno for ignition and lighting, and a three-speed gearbox. It sat in the company's popular 250 range of the period and was fitted with twin exhaust pipes.
