750 Sei

1975 Benelli 750 Sei Technical Analysis & Specification Breakdown

Engineered by Benelli for the classic motorcycle segment, the 1975 Benelli 750 Sei utilizes a 747 cc (45.6 cu in) air-cooled in-line six, four-stroke layout. In factory specification, peak output is rated at 58 HP (42.3 kW) at 8,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 77.6 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the 750 Sei measures 255 kg (562 lbs) wet (curb), translating to a power-to-weight ratio of 0.23 HP/kg (4.4 kg per horsepower). The 22-liter (5.8 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 180 km/h (112 mph).

Within MotoLibrary's Benelli archive, this model family spans 5 indexed model years from 1974 to 1978, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.