1979 Yamaha RD 400 specifications
Available technical data for this model and year. Specifications can vary by market and version.
Technical specifications
| Displacement | 399.0 ccm (24.35 cubic inches) |
|---|---|
| Engine type | Twin, two-stroke |
| Power | 43.0 HP (31.4 kW )) @ 7500 RPM |
| Compression | 6.0:1 |
| Bore x stroke | 64.0 x 62.0 mm (2.5 x 2.4 inches) |
| Fuel control | Membrane |
| Cooling system | Air |
| Gearbox | 6-speed |
| Transmission type | Chain (final drive) |
| Front brakes | Single disc |
| Rear brakes | Single disc |
| Front tyre | 3.00-18 |
| Rear tyre | 3.50-18 |
| Weight incl. oil, gas, etc | 175.0 kg (385.8 pounds) |
| Fuel capacity | 16.50 litres (4.36 US gallons) |
| Top speed | 175.0 km/h (108.7 mph) |
Source: Bikez: RD 400, 1979. 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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