|
Make Model |
Ducati 250 Mark 3D |
|
Year |
1963-68 |
|
Engine |
Air cooled, four stroke, single cylinder,
Desmo SOHC |
|
Capacity |
249 |
|
Bore x Stroke |
74 x 57.8 mm |
|
Compression Ratio |
10.0:1 |
|
Induction |
29mm Dell'Orto carb |
|
Ignition /
Starting |
Battery coil / kick |
|
Max Power |
20.4 KW 28 hp @ 8500 rpm |
|
Transmission /
Drive |
5 Speed / chain |
|
Front Suspension |
Hydraulic forks |
|
Rear Suspension |
Dual shocks swingarm |
|
Front Brakes |
180mm Drum |
|
Rear Brakes |
160mm Drum |
|
Front Tyre |
3.50-18 |
|
Rear Tyre |
3.50-18 |
|
Dry-Weight |
127 kg |
|
Fuel Capacity |
13 Litres |
|
Standing
¼ Mile |
18.9 sec |

The narrow case Ducati single
cylinders were selling well and known worldwide through out the decade. Later
in the decade when Ducati introduced the wide-case production models they
represented the pinnacle of Ducati singles for the times. A single camshaft
that was driven by bevel gears characterized the wide-case Ducati motorcycles.
As a direct descendent of the
narrow-case family, the Ducati 250cc and 350cc versions of the wide-case
models were first produced in the spring of 1968. The Ducati 450cc was added
in the following year. The performance and elegant mechanics of the
motorcycles immediately caught the attention of motorcycle enthusiasts
worldwide.
Perhaps the most famous wide-case
Ducati was the Scrambler. The Ducati Scrambler motorcycle sold tens of
thousands around the world, leading to its legendary status. The fast and
agile Ducati Mark 3 sports model was soon joined by the Ducati Mark 3D - the
first Ducati with the now famous Desmodromic valve gear on a production model.
The word ‘Desmodromic' is not
actually derived from Italian but rather from two Greek roots, desmos (meaning
- linked) and dromos (meaning - track). The Ducati Desmodromic system is
unique in that the valves are positively closed and opened by a cam and
leverage system, rather than relying on standard valve springs. The same basic
Desmodromic layout continues to win world championships today and is deeply
seated in the Ducati Brand identify.
