1977 Benelli 750 Sei

Specifications
- Category
- Naked bike
- Displacement
- 747.0 ccm (45.58 cubic inches)
- Displacement (cc)
- 747.00
- Engine details
- In-line six, four-stroke
- Power
- 58.0 HP (42.3 kW) @ 8500 RPM
- Top speed
- 180.0 km/h (111.8 mph)
- Compression
- 9.8:1
- Bore × stroke
- 56.0 x 50.6 mm (2.2 x 2.0 inches)
- Valves/cyl
- 2.0
- Fuel control
- Overhead Cams (OHC)
- Cooling
- Air
- Gearbox
- 5-speed
- Transmission
- Chain (final drive)
- Front tyre
- 3.50-18
- Rear tyre
- 120/90-18
- Front brakes
- Dual disc
- Rear brakes
- Expanding brake
- Wet weight
- 255.0 kg (562.2 pounds)
- Fuel capacity
- 22.00 litres (5.81 US gallons)
The 1977 Benelli 750 Sei
1977 Benelli 750 Sei sits at the top of Benelli's naked bike range, the flagship that put the company back on the map after De Tomaso took control. This is a road bike built to be heard and seen as much as ridden, with that transverse six-cylinder engine humming through six individual header pipes fanning out beneath the tank. It's a heavy, stately machine rather than a quick-handling one, better suited to sweeping highway miles than tight backroads, and the weight is noticeable at low speeds and when maneuvering it in a garage. Owning one means committing to a mechanically complex machine that demands a mechanic who understands it, not a shop that just services Japanese fours. The 1977 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 1976 example should focus on mileage, service history, and condition rather than spec differences. Collectors and Benelli specialists drive most of the demand here, often riders who already own Italian or Japanese multi-cylinder classics and want something rarer to add to the stable. Given the high collector interest, condition and originality matter more than mileage alone when evaluating a 1977 Benelli 750 Sei.
Auction history
| Date | Listing | Price | Mileage | Source |
|---|---|---|---|---|
| Jan 9, 2024 | 1976 Benelli 750 Sei | $12,000 | — | Bring a Trailer |
| Dec 19, 2022 | 1977 Benelli 750 Sei | $18,500 | — | Bring a Trailer |
| Jun 13, 2016 | 1977 Benelli 750 Sei | $10,750 | — | Bring a Trailer |
