XS 400 SE

1982 Yamaha XS 400 SE Technical Analysis & Specification Breakdown

Built around Yamaha's custom - cruiser motorcycle platform, the 1982 Yamaha XS 400 SE utilizes a 392 cc (23.9 cu in) air-cooled twin, four-stroke layout. In factory specification, peak output is rated at 27 HP (19.7 kW) at 7,500 rpm while maximum torque reaches 31.2 Nm (23 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 68.9 HP per liter and a 1,500 rpm working window between peak torque (6,000 rpm) and peak power (7,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the XS 400 SE measures 178 kg (392 lbs) wet (curb), translating to a power-to-weight ratio of 0.15 HP/kg (6.59 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,364 mm (53.7 in) wheelbase engineered for quick, flickable steering geometry. The 14-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 139 km/h (86 mph).

Within MotoLibrary's Yamaha archive, this model family spans 2 indexed model years from 1982 to 1983, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.