GSX 400 S

1987 Suzuki GSX 400 S Technical Analysis & Specification Breakdown

At the heart of the 1987 Suzuki GSX 400 S naked motorcycle, Suzuki pairs a 399 cc (24.4 cu in) air-cooled twin, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 27 HP (19.7 kW) at 7,800 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 67.7 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 GSX 400 S measures 190 kg (419 lbs) wet (curb), translating to a power-to-weight ratio of 0.14 HP/kg (7.04 kg per horsepower). The 15-liter (4 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 151 km/h (94 mph).

Within MotoLibrary's Suzuki archive, this model family spans 7 indexed model years from 1981 to 1988, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.