| Year | 1978 |
| Battery | Yuasa 12N/12A-4A-12V |
| Bore x Stroke | 86 x 74.4 mm |
| Capacity | 864 cc / 52.7 cu in |
| Clutch | Wet, multiplate |
| Compression Ratio | 9.5:1 |
| Cooling System | Air cooled |
| Dimensions | Length: 2200 mm / 86.6 in Width: 675 mm / 26.6 in Height: 1050 mm / 41.3 in |
| Dry Weight | 188 kg / 414 lbs |
| Engine | Four stroke, 90°“L”twin cylinder, SOHC, 2 valves per cylinder, bevel gear driven |
| Final Drive | Chain |
| Final Drive Ratio | 2.312:1 (16/37) |
| Front Brakes | 2 x 280mm Disc, 1 piston caliper |
| Front Suspension | 38 mm Marzocchi fork |
| Front Wheel | 3.50 - 18 |
| Fuel Capacity | 20 L / 5.3 US gal / 4.4 Imp gal |
| Gear Ratios | 1st 2.237 / 2nd 1.562 / 3rd 1.203 / 4th 1.000 / 5th 0.887 |
| Ignition | Electronic |
| Induction | 2 x Dell'Orto PHM 40 A, B or C carburetors |
| Manual | Bevelheaven.com |
| Max Power | 49.2 kW / 67 hp @ 7500 rpm |
| Primary Drive Ratio | 2.187:1 (32/70) |
| Rear Brakes | Single 229 mm disc |
| Rear Suspension | Marzocchi 310 mm dual shocks, 3-way adjustable |
| Rear Wheel | 4.00 - 18 |
| Road Test | BIKE 1978 Ducati 900SS vs Le Mans III |
| Seat Height | 760 mm / 29.9 in |
| Spark Plugs | Champion L81 / L82Y / L88A / Bosch WM7B |
| Standing ¼ Mile | 12.6 sec |
| Starting | Kick (electric as an option) |
| Top Speed | 217 km/h / 135 mph |
| Transmission | 5 Speed |
| Wheelbase | 1500 mm / 59.0 in |
