Ducati 250 GT

Make Model	Ducati 250 GT / 250 Monza
Year	1964 - 66
Engine	Four stroke, single cylinder, SOHC, bevel gear-drive
Capacity	248.6 cc / 15.2 cu in
Bore x Stroke	74 x 57.8 mm
Compression Ratio	8:1
Cooling System	Air cooled
Induction	Dell'orto UBF24BS carburetor
Ignition	6V 60W generator
Spark Plug	Marelli CW269N / Beru 260 / KLG F-100
Starting	Kick
Max Power	GT: 13.7 kW / 18.4 hp @ 7200 rpm Monza: 16.4 kW / 22 hp @ 7200 rpm
Clutch	Wet, multi-plate
Primary Drive Ratio	2.500:1
Transmission	5 Speed
Gear Ratios	1st 2.53 / 2nd 1.73 / 3rd 1.35 / 4th 1.10 / 5th 0.97:1
Final Drive	Chain
Final Drive Ratio	GT: 18/45 Monza: 17/45
Frame	Single downtube, open frame with large diameter backbone tube
Front Suspension	Hydraulic telescopic fork, Ducati 31.5 mm
Rear Suspension	Swingarm, dual shocks, Marzocchi
Front Brakes	Drum, 180 mm
Rear Brakes	Drum, 160 mm
Front Tyre	2.75-18
Rear Tyre	3.00-18
Dimensions	Length: 2000 mm / 78.7 in Height: 1070 mm / 42.1 in
Wheelbase	1320 mm / 52 in
Seat Height	800 mm / 31.5 in
Dry Weight	125 kg / 275 lbs
Fuel Capacity	13 L / 3.4 US gal / 2.9 Imp gal
Top Speed	128 km/h / 80 mph

The 250 GT and Monza were very similar bikes with only very small differences such as different fenders, triple clamps.

In actual fact, as from 1966 apart from different decals, the two bikes were exactly the same.