| MODEL | BSA B32 350 1946 - 1949 |
| Year | 1946 - 1949 |
| Engine Type | Four-stroke, single cylinder, OHV |
| Displacement / Capacity | 348 cc / 21.2 cu in |
| Bore X Stroke | 71 x 88 mm |
| Compression Ratio | 6.5:1 |
| Cooling System | Air cooled |
| Max Power | 16.2 kW / 22 hp @ 6000 rpm |
| Max Torque | — |
| Ignition | Lucas MO1L magneto |
| Induction | Single Amal Monobloc |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | Dry sump |
| Gear Box | 4-speed manual |
| Clutch | Multi-plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Hydraulic fork |
| Rear Suspension | Swinging arm with shock absorbers |
| Front Brakes | 8 in drum |
| Rear Brakes | 7 in drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 175 kg / 385 lb |
| WHEEL SPECS | |
| Front Tyre | 3.25 x 19 |
| Rear Tyre | 3.50 x 19 |
| FUEL SYSTEM | |
| Fuel Capacity | 19 Litres / 5 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The competition-oriented cousin of the B31, announced in early 1946 with a high-level exhaust, lighter chrome mudguards, a crankcase shield and lower gearing. From 1949 an alloy barrel and head and plunger rear suspension were available as options. It led on to the Gold Star line.
