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Yamaha
DT 400
Enduro · 397 cc
- Engine
- 397 cc
- Power
- 29 hp
- Weight
- 134 kg
This text was partly made with AI and may contain errors.
What should you pay for a DT 400?
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Model family
DT 400 at a glance
Quick reference values. Model year, generation and trim can differ.
Displacement
397 cc
Power
29 hp · 21 kW
Category
Enduro
Specifications
- Displacement
- 397 cc
- Power
- 29 hp · 21 kW
- Weight
- 134 kg
- Seat height
- 850 mm
- Fuel capacity
- 11 l
- Top speed
- 135 km/h
- Production
- 1975 – 1979
- Category
- Enduro
Comparable models
Also worth considering
Models in the same category and price range to consider alongside the DT 400.
Generations and editions
Features and handling differ by generation. Use this overview to find the right version.
1 variants
Years
1975 - 1979
1975–1979 · DT 400
GenerationThe DT 400 is the large air-cooled 397cc two-stroke in Yamaha's straightforward dual-purpose chassis. Check that the Autolube and airbox parts are complete, as both matter for reliability and originality.
397 cc29 hp1 cyl.
About this model
About the Yamaha DT 400
The Yamaha DT 400 is a large air-cooled single-cylinder two-stroke enduro from the mid-1970s. It combines a 397cc engine with long suspension travel, a high exhaust and simple construction that works on both unpaved roads and secondary tarmac. It is not a modern trail bike: power arrives abruptly, brakes and suspension are period equipment and the seat is tall.
For a buyer, a complete and as-original-as-possible DT 400 is usually the sensible choice. Check the frame and underside for old off-road damage and inspect the crankshaft, piston and gearbox critically. Not every part is easy to source, so the correct exhaust, airbox and oil pump have real value. A well-maintained example is a characterful classic for relaxed lanes and trails, not daily motorway use.
- Category
- Enduro
- Production
- 1975 – 1979
- Power
- 29 hp
- Weight
- 134 kg
Before you buy
What to check before buying
- Measure compression and listen for crankshaft or big-end noise; rebuilding a large two-stroke can be expensive.
- Inspect the Autolube oil tank, pump and lines for leaks or incorrect adjustment before sustained riding.
- Inspect frame, swingarm, rims and fork legs for cracks, misalignment and signs of hard off-road use.
- Check tank and carburettor for corrosion after storage, then test charging coil, lights and ignition.