| MODEL | BSA BANTAM D14/4 (SUPREME, SPORTS, BUSHMAN) 1968 - 1969 |
| Year | 1968 - 1969 |
| Engine Type | Single cylinder, two-stroke |
| Displacement / Capacity | 173 cc |
| Bore X Stroke | — |
| Compression Ratio | 10:1 |
| Cooling System | — |
| Max Power | 12.6 bhp |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4-speed |
| Clutch | — |
| Final Drive | — |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | Drum, 5 in |
| Rear Brakes | Drum, 5 in |
| 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 | 65 mph / 105 km/h |
The D14/4 gave every Bantam a four-speed gearbox and a higher-compression engine, raising output to 12.6 bhp. It brought a noticeable jump in performance over the D10 and was sold as Supreme, Sports and Bushman.
