| MODEL | DUCATI 250 DIANA MARK 3 1962 - 1964 |
| Year | 1962 - 1964 |
| Engine Type | Four-stroke, single cylinder, desmodromic SOHC, bevel gear driven |
| Displacement / Capacity | 249 cc / 15.2 cu in |
| Bore X Stroke | 74 x 57.8 mm |
| Compression Ratio | 10.0:1 |
| Cooling System | Air cooled |
| Max Power | 22.4 kW / 30 hp @ 8300 rpm |
| Max Torque | — |
| Ignition | 6V 40W generator with magneto |
| Induction | Dell'Orto SS1 27A |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4-speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | 31.5 mm hydraulic telescopic fork |
| Rear Suspension | Swingarm with dual shocks, 3-way adjustable |
| Front Brakes | Drum, 180 mm |
| Rear Brakes | Drum, 160 mm |
| DIMENSION SPECS | |
| Overall Length | 2000 mm / 78.7 in |
| Overall Width | 580 mm / 22.8 in |
| Overall Height | 1090 mm / 42.9 in |
| Seat Height | 750 mm / 29.5 in |
| Wheelbase | 1320 mm / 52.0 in |
| Ground Clearance | — |
| Dry Weight | 110 kg / 243 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 2.50-18 |
| Rear Tyre | 2.75-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 17 Litres / 4.5 US gal |
| Fuel Consumption | — |
| Top Speed | 177 km/h / 110 mph |
A higher-performance Diana developed mainly for the American market, with a 10:1 compression engine, hotter carburation and a lighter build. It was Ducati's quick 250 sports single of the early 1960s and led to the five-speed Mach 1.
