Yamaha DS 7

Yamaha DS 7

The Yamaha DS 7 was a twin, two-stroke standard produced by Yamaha between 1971 and 1972.

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Model year
1971
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Make
Yamaha
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Engine Power
23.79 HP (17.5 kW) @ 7500 rpm
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Top Speed
86.99 mph

Technical Specifications

Engine and transmission

  • Engine type:
    2 cylinders, 2-stroke
  • Displacement:
    247 cc (15.09 cubic inches)
  • Bore × stroke:
    2.13 inch × 2.13 inch (square)
  • Cooling system:
    Air cooled
  • Power:
    23.79 HP (17.5 kW) @ 7500 rpm
  • Throttle:
    Cable operated
  • Sparks per cylinder:
    1
  • Fuel supply system:
    Carburetor
  • Compression:
    7.1:1
  • Gear box:
    Manual 5-speed
  • Clutch:
    Wet, multiple discs, cable operated
  • Final drive:
    Chain

Dimensions

  • Curb weight:
    321.9 lbs

Chassis and suspension

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

Other

  • ABS available:
    No
  • Power-to-weight ratio:
    0.12 KW/lbs (8.34 lbs/HP)
  • Top speed:
    86.99 mph
  • Fuel capacity:
    3.17 gals
  • Number of riders:
    2 persons

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