Benelli 750 Sei (1974-75)

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The Benelli 750 Sei was a 6-cylinder motorcycle produced in 1974-75. Its engine was a transverse 4-stroke with 2 valves per cylinder and a capacity of 748cc. The bike had a compression ratio of 9.8:1 and was cooled by air, with an exhaust of 2×3-into-1-into-3. The Sei had a maximum power of 52.9 kW/71 hp at 8500 rpm and a 5-speed transmission with a chain final drive. It had a Marzocchi telescopic cartridge-type suspension with dual Sebac shocks in the rear. The front brakes used 2x300mm discs and 2-piston calipers while the rear brakes used a 200mm drum. The bike weighed 220 kg/485 lbs and had a fuel capacity of 23 litres/6.1 US gal. It consumed an average of 5.9 L/100 km and had a standing quarter-mile time of 14.0 sec/148 km/h/92 mph with a top speed of 190 km/h/118 mph. The bike has been reviewed on benellimotoclub and compared to the CBX and Z1300.

Technical specifications:

Make Model: Benelli 750 Sei

Year: 1974-75


Engine: Transverse six cylinders, four stroke, SOHC, 2 valve per cylinder
Capacity: 748 cc / 46.6 cu in
Bore x Stroke: 56 x 50.6 mm
Compression Ratio: 9.8:1
Cooling System: Air cooled
Exhaust: 2 x 3-into-1-into-3
Induction: 3 x 24mm Dell’Orto carburetors
Ignition: Battery ignition (later model electronic ignition)
Starting: Electric & kick start
Max Power: 52.9 kW / 71 hp @ 8500 rpm
Transmission: 5 Speed
Final Drive: Chain
Front Suspension: Marzocchi telescopic cartridge-type suspension forks (Some models used Paoli!)
Rear Suspension: Dual Sebac shocks, preload adjustable
Front Brakes: 2 x 300 mm discs, 2 piston calipers

Rear Brakes: 200 mm drum
Front Tyre: 3.25-18
Rear Tyre: 4.10-18
Dry Weight: 220 kg / 485 lbs
Fuel Capacity: 23 Litres / 6.1 US gal
Consumption Average: 5.9 L/100 km / 17 km/l / 40 mpg
Standing 1/4 Mile: 14.0 sec / 148 km/h / 92 mph
Top Speed: 190 km/h / 118 mph
Reviews: benellimotoclub – sei vs cbx vs z1300

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