The Benelli 750 Sei is a true icon of Italian motorcycle design, a six-cylinder superbike that exudes style and sophistication.
Its 748cc engine may not have been revolutionary in terms of innovation, but it packed a claimed 71 bhp punch at 8500rpm, making it an effortless performer on the road. The SOHC unit featured a central camchain, similar to Honda’s four-cylinder design, but with key differences that set it apart.
Riding the Sei is a masterclass in smoothness and handling, with the six gleaming chrome-plated exhaust mufflers adding to its eye-catching presence. As the only six-cylinder bike on the market when launched in 1974, it was an instant head-turner, backed by Benelli’s impressive pedigree as world champions.
The Benelli 750 Sei is a testament to the brand’s engineering prowess and design flair, combining remarkable performance with stunning looks that set it apart from its Japanese rivals.
Key Specifications
Engine Type
Transverse six cylinders, four stroke, SOHC, 2 valve per cylinder
Engine Capacity
748 cc / 46.6 cu in
Max Power
52.9 kw / 71 hp
Fuel Tank Capacity
6.1 US gallons / 23.0 L
*n/a – information not provided by manufacturer
All Specifications
Make & Model
Model
Benelli 750 Sei
Year
1974-75
Engine
Engine Type
Transverse six cylinders, four stroke, SOHC, 2 valve per cylinder
Displacement
748 cc / 46.6 cu in
Bore x Stroke
56 x 50.6 mm
Compression Ratio
9.8:1
Max Horsepower
52.9 kw / 71 hp
Engine Management System
3 x 24mm Dell’Orto carburetors
Cooling System
Air cooled
Exhaust
2 x 3-into-1-into-3
Performance
Top Speed
190 km/h / 118 mph
*n/a – information not provided by manufacturer
Transmission
Gearbox
5 Speed
Final Drive
Chain
Electrical & Electronics System
Starter
Electric & kick start
Chassis & Suspension
Front Suspension
Marzocchi telescopic cartridge-type suspension forks (Some models used Paoli!)
Rear Suspension
Dual Sebac shocks, preload adjustable
Wheels & Brakes
Front Tire Size
3.25-18
Rear Tire Size
4.10-18
Front Brakes
2 x 300 mm discs, 2 piston calipers
Rear Brakes
200 mm drum
Dimension & Weights
Fuel Tank Capacity
6.1 US gallons / 23.0 L
Dry Weight
220 kg / 485 lbs
Features
748cc engine
SOHC unit
Central camchain
56 x 50.6 mm cylinder dimensions
Alternator located behind cylinders on the right
Three 24mm Dell’Orto carburettors
Angled inlet manifolds
Narrow crankcases
Tractable mid-range performance
Useful torque above 2000rpm in top gear
Crisp carburetion
Smooth power delivery
Top speed of about 115mph (185km/h)
Effortless high-speed cruising ability
Conventional steel twin-cradle frame
Marzocchi forks
Rear shocks from Marzocchi or Sebac
Good straight-line stability
Impressive agility for a big bike
Generous ground clearance
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*We strive to provide the most comprehensive and accurate specifications possible. However, certain details may not be available if the manufacturer did not disclose them or if the information is no longer publicly accessible. If you find any discrepancy with any data on this site, please feel free to let us know at contact@throttlecraze.com
