| MODEL | BSA X35-0 1933 - 1936 |
| Year | 1933 - 1936 |
| Engine Type | Four stroke, single cylinder, OHV |
| Displacement / Capacity | 149 cc / 9.1 cu in |
| Bore X Stroke | 52 x 70 mm |
| Compression Ratio | — |
| Cooling System | Air cooled |
| Max Power | 1.1 kW / 1.49 hp |
| Max Torque | — |
| Ignition | Lucas Maglita |
| Induction | — |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | — |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Coil springs with steering damper |
| Rear Suspension | None, spring loaded saddle |
| 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 | — |
A tiny overhead-valve 150 cc single launched in late 1933 for riders wanting something livelier and sportier-looking than a side-valve lightweight. It used the Lucas Maglita combined lighting and ignition unit, whose drive moved from the primary side to the timing side for 1935. It stayed in the BSA range for three seasons.
