| MODEL | BENELLI 900SEI SPORT 1983 |
| Year | 1983 |
| Engine Type | Four stroke, transverse six cylinders, SOHC, 2 valves per cylinder |
| Displacement / Capacity | 906 cc / 55.3 cu in |
| Bore X Stroke | 60 x 53.4 mm |
| Compression Ratio | 9.5:1 |
| Cooling System | Air cooled |
| Max Power | 58.3 kW / 80 hp @ 8400 rpm |
| Max Torque | — |
| Ignition | Electronic |
| Induction | 3 x 24 mm Dell'Orto carburetors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic forks |
| Rear Suspension | Dual shocks, spring 5-way preload adjustable |
| Front Brakes | 2 x 294 mm discs, 2 piston calipers |
| Rear Brakes | Single 255 mm disc, 1 piston caliper |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 254 kg / 560 lbs |
| WHEEL SPECS | |
| Front Tyre | 100/90-18 |
| Rear Tyre | 120/90-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 16.5 Litres / 4.4 US gal |
| Fuel Consumption | 5.7 L/100 km / 17.6 km/l / 41.4 mpg |
| Top Speed | 198.8 km/h / 120.4 mph |
The 900 Sei was the smaller-capacity successor to the 750 Sei, keeping the unusual air-cooled transverse six-cylinder layout in a sportier chassis. This 1983 Sport version is one of the later cars, after Benelli had strengthened the clutch, revised the forks and replaced the awkward early fairing. Testers found it heavy and not especially quick, but praised its handling, brakes and exotic character.
