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| Model | Yamaha XS 400 |
| Year | 1982 |
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|---|
| Displacement | 392.0 ccm (23.92 cubic inches) |
| Engine type | Twin, four-stroke |
| Power | 27.0 HP (19.7 kW) @ 7000 RPM |
| Top speed | 143.2 km/h (89.0 mph) |
| Compression | 9.2:1 |
| Bore x stroke | 69.0 x 52.4 mm (2.7 x 2.1 inches) |
| Valves per cylinder | 2 |
| Fuel system | Carburettor. 2 x 3 2 mm Mikuni |
| Fuel control | Overhead Cams (OHC) |
| Ignition | Transistorized |
| Lubrication system | Wet sump |
| Gearbox | 6-speed |
| Transmission type | Chain (final drive) |
| Clutch | Wet, multiplate |
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|---|
| Rake (fork angle) | 27.0° |
| Trail | 95 mm (3.7 inches) |
| Front suspension | Hydraulic telescopic forks |
| Rear suspension | Monocross system with single coil sprung, gas/oil damped shock, pre-load adjustable |
| Front tire | 3.00-18 |
| Rear tire | 4.00-18 |
| Front brakes | Single disc |
| Rear brakes | Expanding brake |
| Dry weight | 169.0 kg (372.6 pounds) |
| Weight incl. oil, gas, etc | 182.0 kg (401.2 pounds) |
| Power/weight ratio | 0.1598 HP/kg |
| Overall width | 400 mm (15.7 inches) |
| Fuel capacity | 17.00 litres (4.49 US gallons) |
| Oil capacity | 2.30 litres (2.43 US quarts) |
