| MODEL | VELOCETTE U 1928 |
| Year | 1928 |
| Engine Type | Two-stroke, single cylinder |
| Displacement / Capacity | 249 cc / 15.2 cu in |
| Bore X Stroke | 63 x 80 mm |
| Compression Ratio | — |
| Cooling System | Air cooled |
| Max Power | — |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | Kick start |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 3-speed, hand-controlled |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Webb forks |
| Rear Suspension | Spring-loaded saddle |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| 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 | — |
The Model U was the revived 250 cc Velocette two-stroke of the late 1920s, with better brakes, light Webb forks and a saddle tank. Its twin-port engine gained a roller big end and a three-speed hand-change gearbox. It earned a reliable reputation and a sports sibling, the USS, followed.
