Yamaha DT 400 MX

Yamaha DT 400 MX

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Model year
1978
make icon
Make
Yamaha
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Engine Power
20.8 HP (15.3 kW) @ 5600 rpm
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Top Speed
84.51 mph

Technical Specifications

Engine and transmission

  • Engine type:
    1 cylinders, 2-stroke, Single
  • Displacement:
    397 cc (24.26 cubic inches)
  • Bore × stroke:
    3.35 inch × 2.76 inch (oversquare - shortstroke)
  • Cooling system:
    Air cooled
  • Power:
    20.8 HP (15.3 kW) @ 5600 rpm
  • Throttle:
    Cable operated
  • Valve train:
    Reed valve, variable
  • Sparks per cylinder:
    1
  • Fuel supply system:
    Carburetor
  • Ignition type:
    mechanically timed
  • Compression:
    6.4:1
  • Engine mounting:
    Transverse
  • Gear box:
    Manual 5-speed
  • Clutch:
    Wet, multiple discs, cable operated
  • Final drive:
    Chain
  • Starter:
    Electric

Dimensions

  • Curb weight:
    310.9 lbs

Chassis and suspension

  • Front
    Suspension:
    Cartridge
    Brake:
    Drum
  • Rear
    Suspension:
    mono shock, Swingarm
    Brake:
    Drum
  • Frame type:
    steel, Double cradle frame

Other

  • ABS available:
    No
  • Power-to-weight ratio:
    0.11 KW/lbs (9.22 lbs/HP)
  • Top speed:
    84.51 mph
  • Fuel capacity:
    2.38 gals
  • Number of riders:
    2 persons

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