XS 400 DOHC

1982 Yamaha XS 400 DOHC Technical Analysis & Specification Breakdown

Engineered by Yamaha for the naked motorcycle segment, the 1982 Yamaha XS 400 DOHC utilizes a 399 cc (24.4 cu in) air-cooled twin, four-stroke layout. In factory specification, peak output is rated at 45 HP (32.8 kW) at 9,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 112.8 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 XS 400 DOHC measures 187 kg (412 lbs) wet (curb), translating to a power-to-weight ratio of 0.24 HP/kg (4.16 kg per horsepower). The 18-liter (4.8 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 168 km/h (104 mph).

Within MotoLibrary's Yamaha archive, this model family spans 9 indexed model years from 1982 to 1990, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.