GSX 400 F Katana

1981 Suzuki GSX 400 F Katana Technical Analysis & Specification Breakdown

Positioned in Suzuki's sport touring motorcycle lineup, the 1981 Suzuki GSX 400 F Katana features a 399 cc (24.4 cu in) air-cooled in-line four, four-stroke configuration. In factory specification, peak output is rated at 42 HP (30.7 kW) at 10,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 105.3 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 GSX 400 F Katana measures 197 kg (434 lbs) wet (curb), translating to a power-to-weight ratio of 0.21 HP/kg (4.69 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 170 km/h (106 mph).

Within MotoLibrary's Suzuki archive, this model family spans 3 indexed model years from 1981 to 1983, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.