XJ 750 S

1984 Yamaha XJ 750 S Technical Analysis & Specification Breakdown

Built around Yamaha's classic motorcycle platform, the 1984 Yamaha XJ 750 S relies on a 749 cc (45.7 cu in) air-cooled in-line four, four-stroke powerplant. In factory specification, peak output is rated at 87 HP (63.5 kW) at 9,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and shaft drive (cardan) final drive. With a specific output of 116.2 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 XJ 750 S measures 241 kg (531 lbs) wet (curb), translating to a power-to-weight ratio of 0.36 HP/kg (2.77 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 203 km/h (126 mph).

Within MotoLibrary's Yamaha archive, this model family spans 3 indexed model years from 1984 to 1986, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.