The Yamaha DT 400 motorcycle specifications include a 397 cc (24.22 cu in) engine, power of 21 hp (15.3 kW) @ 5,600 rpm, a 5-speed gearbox, and a listed weight of 123.4 kg (272 lb).
Key specifications
The 1975 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
How the Yamaha DT 400 compares
This compares the motorcycle with all Yamaha models in this specifications database. The blue marker is this model and the grey line is the Yamaha database average.
About 61% lower than the Yamaha database average. Around the 36th percentile across Yamaha models.
About 28% lower than the Yamaha database average. Around the 46th percentile across Yamaha models.
About 31% smaller than the Yamaha database average. Around the 30th percentile across Yamaha models.
Yamaha database percentile rankings
Percentiles show where this motorcycle sits across the Yamaha specifications database. They are descriptive database rankings, not performance ratings.
21 hp — more powerful than about 36% of Yamaha models with power data.
397 cc — larger displacement than about 46% of Yamaha models.
9 L — larger than about 30% of Yamaha fuel tanks in this database.
Dimensions compared with Yamaha average
Each measurement is compared with the average value across Yamaha models where that dimension is available.
2,180
2,082
5% above average.
870
823
6% above average.
1,140
1,172
Close to average.
1,410
1,416
Close to average.
Mechanical overview
Additional useful specifications
| Power-to-weight ratio | 0.170 hp/kg |
|---|---|
| Power-to-weight | 170.2 hp/tonne |
| Specific power | 52.9 hp/L |
| Bore/stroke ratio | 1.21:1 (Oversquare) |
Engine specifications
| Engine type | Single cylinder, two-stroke |
|---|---|
| Displacement | 397 cc (24.22 cu in) |
| Power | 21 hp (15.3 kW) @ 5,600 rpm |
| Torque | 37.3 Nm (3.8 kgf-m or 27.5 ft.lbs) @ 5,000 rpm |
| Bore × stroke | 85.0 x 70 mm (3.3 x 2.8 inches) |
| Compression ratio | 6.4:1 |
| Cooling system | Air |
| Fuel system | Carburettor. Mikuni |
| Fuel control | Membrane |
| Ignition | CDI |
| Starter | Kick |
Transmission and drivetrain
| Gearbox | 5-speed |
|---|---|
| Final drive | Chain (final drive) |
Brakes, wheels and tires
| Front brakes | Expanding brake (drum brake) |
|---|---|
| Rear brakes | Expanding brake (drum brake) |
Dimensions and weight
| Dry weight | 123.4 kg (272 lb) |
|---|---|
| Overall length | 2,180 mm (85.8 inches) |
| Overall width | 870 mm (34.3 inches) |
| Overall height | 1,140 mm (44.9 inches) |
| Wheelbase | 1,410 mm (55.5 inches) |
Fuel and emissions
| Fuel capacity | 9.00 L (2.38 US gal) |
|---|
Performance
| Top speed | 136.0 km/h (84.5 mph) |
|---|---|
| Power/weight ratio | 0.1702 hp/kg |
Other specifications
| Color options | Yamaha Competition Yellow |
|---|
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Yamaha models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Yamaha information before relying on them. Visit the official Yamaha website.