1983 Benelli 900 Sei

Specifications
- Category
- Sport touring
- Displacement
- 905.0 ccm (55.22 cubic inches)
- Displacement (cc)
- 905.00
- Engine details
- In-line six, four-stroke
- Power
- 80.0 HP (58.4 kW) @ 8300 RPM
- Top speed
- 193.0 km/h (119.9 mph)
- Compression
- 9.5:1
- Bore × stroke
- 60.0 x 53.4 mm (2.4 x 2.1 inches)
- Valves/cyl
- 2.0
- Fuel control
- Overhead Cams (OHC)
- Cooling
- Air
- Gearbox
- 5-speed
- Transmission
- Chain (final drive)
- Front tyre
- 100/90-18
- Rear tyre
- 120/90-18
- Front brakes
- Dual disc
- Rear brakes
- Single disc
- Wet weight
- 249.0 kg (549.0 pounds)
- Fuel capacity
- 17.00 litres (4.49 US gallons)
The 1983 Benelli 900 Sei
Sitting at the top of Benelli's sport touring range, the 1983 Benelli 900 Sei was the closest thing the Pesaro factory offered to a grand statement machine. That inline-six configuration remains the whole point of owning one: smooth, distinctive-sounding, and mechanically complex in a way that few manufacturers ever bothered to attempt on a production motorcycle. This isn't a bike built for quarter-mile bragging rights or canyon-carving theatrics. It's built for covering real distance with a level of refinement that made most twins and fours of the era feel comparatively crude, while still asking for a mechanic who actually understands multi-cylinder Italian engineering.
The 1983 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 1982 example should focus on mileage, service history, and condition rather than spec differences.
Collectors and long-time Benelli enthusiasts drive most of the interest here, often riders who already own a more common Japanese six-cylinder and want the rarer, more mechanically interesting alternative. It's a considered purchase rather than an impulse buy, and provenance matters enormously to value.
Auction history
| Date | Listing | Price | Mileage | Source |
|---|---|---|---|---|
| Jun 30, 2025 | 1983 Benelli 900 Sei | $20,000 | — | Bring a Trailer |
| Oct 6, 2024 | 1983 Benelli 900 Sei | $13,500 | — | Bring a Trailer |
| Mar 12, 2022 | 1983 Benelli 900 Sei | $35,000 | — | Bring a Trailer |