K 75 S

1989 BMW K 75 S Technical Analysis & Specification Breakdown

Engineered by BMW for the sport touring motorcycle segment, the 1989 BMW K 75 S relies on a 740 cc (45.2 cu in) liquid-cooled in-line three, four-stroke powerplant. In factory specification, peak output is rated at 75 HP (54.7 kW) at 8,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and shaft drive (cardan) final drive. With a specific output of 101.4 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the K 75 S measures 235 kg (518 lbs) wet (curb), translating to a power-to-weight ratio of 0.32 HP/kg (3.13 kg per horsepower). The 21-liter (5.5 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 199 km/h (124 mph).

Within MotoLibrary's BMW archive, this model family spans 11 indexed model years from 1985 to 1995, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.