| MODEL | VELOCETTE KTT MK I 1929 - 1931 |
| Year | 1929 - 1931 |
| Engine Type | Four-stroke, single cylinder, overhead camshaft |
| Displacement / Capacity | 350 cc |
| Bore X Stroke | 74 x 81 mm |
| Compression Ratio | 7.5:1 (9:1 piston for alcohol fuel) |
| Cooling System | — |
| Max Power | — |
| Max Torque | — |
| Ignition | Magneto |
| Induction | — |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 3-speed close-ratio, positive-stop foot change |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Diamond type, gearbox below and behind the engine |
| Front Suspension | Webb trussed girder fork, single spring, friction dampers |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 120 kg / 265 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | 137 km/h / 85 mph |
The KTT Mk I was the production replica of Velocette's works TT racer, offered to private owners from 1929. It had a shaft-and-bevel driven overhead camshaft, a positive-stop foot-change gearbox and a diamond frame, and ran on petrol or, with a special piston, alcohol.
