| MODEL | BSA BANTAM 1948 - 1971 |
| Year | 1948 - 1971 |
| Engine Type | Two-stroke, single cylinder, piston port |
| Displacement / Capacity | 123 - 175 cc |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | Air |
| Max Power | 3 kW / 4 hp (D1) to 9.4 kW / 12.6 hp (D14/4, B175) |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 3-speed (4-speed on later 175 models) |
| Clutch | Multi-plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic forks |
| Rear Suspension | Rigid, plunger or swinging arm depending on model |
| Front Brakes | Drum, 4.5 or 5 in |
| Rear Brakes | Drum, 4.5 or 5 in |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 89 kg / 196 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | 2.26 - 2.82 L/100 km |
| Top Speed | 72 km/h / 45 mph (D1) to 105 km/h / 65 mph (D14/4, B175) |
Photo: SG2012, CC BY 2.0, via Wikimedia Commons
Photo: SG2012, CC BY 2.0, via Wikimedia Commons
The Bantam was BSA's long-running cheap two-stroke commuter, starting as a 125 cc copy of the German DKW RT 125 and growing to 175 cc. More than 250,000 were built, and it became an everyday workhorse, learner machine and, later, a trail bike in the Bushman form.
