1981 Benelli 654

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Specifications
- Category
- Classic
- Displacement
- 604.0 ccm (36.86 cubic inches)
- Displacement (cc)
- 604.00
- Engine details
- In-line four, four-stroke
- Power
- 62.0 HP (45.3 kW) @ 8650 RPM
- Top speed
- 190.0 km/h (118.1 mph)
- Compression
- 9.3:1
- 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
- 3.25-18
- Rear tyre
- 3.50-18
- Front brakes
- Dual disc
- Rear brakes
- Single disc
- Wet weight
- 210.0 kg (463.0 pounds)
- Fuel capacity
- 15.00 litres (3.96 US gallons)
The 1981 Benelli 654
1981 Benelli 654 sits in the middle of Benelli's range, a touring-leaning machine built for riders who wanted comfort and reach rather than outright sport performance. This is a bike that settles into highway miles without fuss, its inline-six architecture (a rarity at this displacement) delivering smooth, unhurried power rather than a sharp hit anywhere in the rev range. It's the kind of motorcycle that rewards a relaxed right wrist and a long stretch of road over a twisty backroad blast, and the fuel range suggests a machine meant for real distances between stops. Ownership means dealing with Italian electrics and a drivetrain layout that's more complex to service than a typical parallel-twin of the era, so a patient mechanic or a good specialist matters. The 1981 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 1980 example should focus on mileage, service history, and condition rather than spec differences. Interest in the 1981 Benelli 654 today comes mostly from riders already into Italian oddities, people stepping away from mainstream Japanese fours who want something mechanically unusual without chasing serious collector money, since values here remain modest and largely condition-driven.