The Ducati 250 Diana was produced from 1961 to 1964 with a four-stroke, single-cylinder, Desmo SOHC, bevel gear-driven engine with a capacity of 248.6 cc. It had a compression ratio of 8.0:1, a Dell’Orto UBF24BS carburetor and was ignitioned by a 6V 40W generator. The bike had a max power of 14.4 kW/19.5 hp at 7550 rpm, a kick start, and a primary drive ratio of 2.500:1. The transmission was four-speed and the final drive was through a chain with a final drive ratio of 2.647:1. The front suspension was Ducati 31.5 mm hydraulic telescopic forks, with the rear being a Swingarm and dual chocks, both of which were 3-way adjustable. The bike had front and rear drum brakes, a 17L fuel capacity, a top speed of 140 km/h (87 mph), and weighed around 120 kg (265 lbs). The bike measured 2000 mm (78.7 in) in length, 960mm (37.8 in) in height, and has a wheelbase of 1320 mm (52.0 in). The seat height was 750mm (29.5 in) and it was fitted with a 2.75-18 front tire and a 3.00-18 rear tire. Overall, the Ducati 250 Diana was a powerful and lightweight bike that was innovative with its engine technology, suspension system, and adjustable rear shock absorbers that made it unique in the market.
Make Model: Ducati 250 Diana
Year: 1961 – 64
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: 8.0:1
Induction: Dell’Orto UBF24BS carburetor
Ignition: 6V 40W generator
Spark Plug: Marelli CW250A
Starting: Kick
Max Power: 14.4 kW / 19.5 hp @ 7550 rpm
Primary Drive Ratio: 2.500:1
Transmission: 4 Speed
Gear Ratios: 1 st 2.75 / 2nd 1.65 / 3rd 1.18 / 4th 0.97:1
Final Drive: Chain
Final Drive Ratio: 2.647:1
Front Suspension: Ducati 31.5 mm hydraulic telescopic forks
Rear Suspension: Swingarm, dual chocks, 3-way adjustable
Front Brakes: 180 mm Drum
Rear Brakes: 160 mm Drum
Front Tyre: 2.75 -18
Rear Tyre: 3.00 -18
Dimensions: Length: 2000 mm / 78.7 in Height: 960 mm / 37.8 in
Wheelbase: 1320 mm / 52.0 in
Seat Height: 750 mm / 29.5 in
Dry Weight: 120 kg / 265 lbs
Fuel Capacity: 17 L / 4.5 US gal / 3.7 Imp gal
Top Speed: 140 km/h / 87 mph
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