GSX 400 L

1981 Suzuki GSX 400 L Technical Analysis & Specification Breakdown

At the heart of the 1981 Suzuki GSX 400 L custom - cruiser 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 8,000 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 L measures 186 kg (410 lbs) wet (curb), translating to a power-to-weight ratio of 0.15 HP/kg (6.89 kg per horsepower). The 11.5-liter (3 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 141 km/h (88 mph).

Within MotoLibrary's Suzuki archive, this model family spans 2 indexed model years from 1981 to 1982, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.