| MODEL | SUNBEAM B2 1959 - 1965 |
| Year | 1959 - 1965 |
| Engine Type | Single cylinder, two-stroke |
| Displacement / Capacity | 175 cc / 10.7 cu in |
| Bore X Stroke | 61.5 x 58 mm |
| Compression Ratio | — |
| Cooling System | Forced air |
| Max Power | 5.6 kW / 7.5 hp |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | Electric (12V) |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4-speed |
| Clutch | — |
| Final Drive | Enclosed chain in oil bath |
| CHASSIS SPECS | |
| Frame | Tubular |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | Drum, 127 mm |
| Rear Brakes | Drum, 127 mm |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | 127 mm / 5.0 in |
| Dry Weight | 100 kg / 220 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.50 x 10 in |
| Rear Tyre | 3.50 x 10 in |
| FUEL SYSTEM | |
| Fuel Capacity | 8 Litres / 2.1 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The B2 was the smaller scooter in the BSA Sunbeam pair, using a 175 cc two-stroke single related to the Bantam engine. It shared the B1's four-speed gearbox, oil-bath chain, 10 in wheels and electric start but was lighter and cheaper. It stayed on sale a year longer than the twin, until 1965.
