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Benelli · 1983

1983 Benelli 900 Sei

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1983 Benelli 900 Sei
Auction record
Average sale
$22,833
Sales
3
Low
$13,500
High
$35,000

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

DateListingPriceMileageSource
Jun 30, 20251983 Benelli 900 Sei$20,000Bring a Trailer
Oct 6, 20241983 Benelli 900 Sei$13,500Bring a Trailer
Mar 12, 20221983 Benelli 900 Sei$35,000Bring a Trailer