Ducati 250 Mark 3 Desmo (1970)
The Ducati 250 Mark 3D Desmo is a 1970 motorcycle with a four-stroke, single cylinder, Desmo SOHC, bevel gear driven engine with a capacity of 248.6 cc. It has a compression ratio of 10.0:1, is air cooled, and its Dell’Orto SS1 29D carburetor is powered by a 6V 30W generator (later 6V 70 W) along with a SAFA 3L3 13.5 Ah battery. It uses a kick start and has a 5-speed transmission with a final drive ratio of 2.812:1. Suspension consists of a hydraulic fork, Ducati 31.5 mm in the front, and a swingarm, Marzocchi dual shocks, 3-way adjustable in the rear. The brakes are 180mm drum in the front and 160mm drum in the rear. The motorcycle has a top speed of 150 km/h / 93 mph and can go from a standing 1/4 mile to 18.9 sec. It is 2000 mm in length, 600 mm in width, and 940 mm in height, with a wheelbase of 1360 mm and a seat height of 735 mm. Its dry weight is 127 kg and it has a fuel capacity of 13 L / 3.4 US gal / 2.9 Imp gal.
Technical specifications:
Make Model: Ducati 250 Mark 3D Desmo
Year: 1970
Engine: Four stroke, single cylinder, Desmo SOHC, bevel gear driven
Capacity: 248.6 cc / 15.2 cu in
Bore x Stroke: 74 x 57.8 mm
Compression Ratio: 10.0:1
Cooling System: Air cooled
Induction: Dell’Orto SS1 29D carburetor
Ignition: Coil, 6V 30W generator (later 6V 70 W)
Battery: SAFA 3L3 13.5 Ah
Spark Plug: Marelli CW260N / Lodge 2HN
Starting: Kick
Max Power: 16.4 kW / 22 hp @ 7500 rpm
Primary Drive Ratio: 2.500:1
Transmission: 5 Speed
Gear Ratios: 1st 2.46 / 2nd 1.73 / 3rd 1.35 / 4th 1.10 / 5th 0.97:1
Final Drive: Chain
Final Drive Ratio: 2.812:1
Front Suspension: Hydraulic fork, Ducati 31.5 mm
Rear Suspension: Swingarm, Marzocchi dual shocks, 3-way adjustable
Front Brakes: 180mm Drum
Rear Brakes: 160mm Drum
Front Tyre: 2.75-18
Rear Tyre: 3.00-18
Dimensions: Length: 2000 mm / 78.7 in Width: 600 mm / 23.6 in Height: 940 mm / 37.0 in
Wheelbase: 1360 mm / 53.5 in
Seat Height: 735 mm / 28.9 in
Dry Weight: 127 kg / 280 lbs
Fuel Capacity: 13 L / 3.4 US gal / 2.9 Imp gal
Standing 1/4 Mile: 18.9 sec
Top Speed: 150 km/h / 93 mph
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