1981 Yamaha XS 400 Special specifications
Available technical data for this model and year. Specifications can vary by market and version.
Technical specifications
| Displacement | 392.0 ccm (23.92 cubic inches) |
|---|---|
| Engine type | Twin, four-stroke |
| Power | 27.0 HP (19.7 kW )) @ 7500 RPM |
| Torque | 32.3 Nm (3.3 kgf-m or 23.8 ft.lbs) @ 8000 RPM |
| Compression | 9.3:1 |
| Bore x stroke | 69.0 x 52.4 mm (2.7 x 2.1 inches) |
| Valves per cylinder | 2 |
| Fuel system | Carburettor. Mikuni BS32 |
| Fuel control | Overhead Cams (OHC) |
| Ignition | Battery ignition with contact breaker points |
| Cooling system | Air |
| Gearbox | 6-speed |
| Transmission type | Chain (final drive) |
| Clutch | Wet multiplate |
| Frame type | Tubular steel, semi-double cradle |
| Front suspension | Telescopic fork |
| Rear suspension | Dual shocks swing arm, preload adjustable |
| Front brakes | Single disc |
| Rear brakes | Expanding brake |
| Front tyre | 3.00-18 |
| Rear tyre | 120/90-16 |
| Weight incl. oil, gas, etc | 180.0 kg (396.8 pounds) |
| Seat height | 780 mm (30.7 inches) If adjustable, lowest setting. |
| Wheelbase | 1364 mm (53.7 inches) |
| Fuel capacity | 14.00 litres (3.70 US gallons) |
| Top speed | 139.0 km/h (86.4 mph) |
Source: Bikez: XS 400 Special, 1981. Retrieved 2026-09-19. Match confidence: exact.
Years listed are the entries held in this archive, rather than a complete production history.
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