| MODEL | DUCATI 900SS 1989 |
| Year | 1989 |
| Engine Type | Four-stroke, 90 degree V-twin, SOHC, desmodromic 2 valves per cylinder, belt driven |
| Displacement / Capacity | 904 cc / 55.2 cu in |
| Bore X Stroke | 92 x 68 mm |
| Compression Ratio | 9.2:1 |
| Cooling System | Air cooled |
| Max Power | 61.8 kW / 84 hp @ 7000 rpm |
| Max Torque | 84 Nm / 62 ft-lb @ 6400 rpm |
| Ignition | Electronic inductive discharge |
| Induction | Weber 44DCNF 118 carburettor |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | 40 mm Marzocchi fully adjustable inverted fork, 120 mm travel |
| Rear Suspension | Progressive type adjustable Marzocchi monoshock, 125 mm travel |
| Front Brakes | 2 x 320 mm discs |
| Rear Brakes | Single 245 mm disc |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 180 kg / 397 lbs |
| Wet Weight | 192.5 kg / 424 lbs |
| WHEEL SPECS | |
| Front Tyre | 120/70-17 |
| Rear Tyre | 170/60-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 17.5 Litres / 4.6 US gal |
| Fuel Consumption | 5.7 L/100 km / 41.2 US mpg |
| Top Speed | 219.4 km/h / 136.3 mph |
The 1989 900SS brought the belt-driven 904 cc desmodromic twin from the Paso into the Supersport line, with a six-speed box, 17-inch wheels and large front discs. Road testers liked its torque and planted handling but criticised patchy low-rev carburation and a noisy dry clutch.
