| MODEL | DUCATI 450 MARK 3D 1973 |
| Year | 1973 |
| Engine Type | Four stroke, single cylinder, SOHC, bevel gear driven |
| Displacement / Capacity | 435.7 cc / 26.6 cu in |
| Bore X Stroke | 86 x 75 mm |
| Compression Ratio | 9.3:1 |
| Cooling System | Air cooled |
| Max Power | 18.4 kW / 25 hp @ 6500 rpm |
| Max Torque | — |
| Ignition | Points and coil (electronic from 1973) |
| Induction | Dell'Orto VHB 29 AD |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 Speed |
| Clutch | Wet, multiplate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | 35 mm Marzocchi telescopic fork |
| Rear Suspension | Swingarm, dual Marzocchi shocks, 3-way adjustable |
| Front Brakes | 180 mm drum |
| Rear Brakes | 150 mm drum |
| DIMENSION SPECS | |
| Overall Length | 2000 mm / 78.7 in |
| Overall Width | 600 mm / 23.6 in |
| Overall Height | 940 mm / 37.0 in |
| Seat Height | 735 mm / 28.9 in |
| Wheelbase | 1360 mm / 53.5 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 2.75-18 |
| Rear Tyre | 3.00-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 13 Litres / 3.4 US gal / 2.9 Imp gal |
| Fuel Consumption | — |
| Top Speed | — |
The 1973 desmo 450 single, with electronic ignition now fitted. It is the same 436 cc bevel-drive engine and chassis as the earlier Mark 3D, praised as one of the great sporting singles. The second series was built 1973-75.
