Wossner forged piston kit with a 67.50mm bore (67.44mm actual) is designed for KTM GS250 and SX250 models from 1995. This piston offers exceptional strength and thermal efficiency, utilising an elliptical design that provides a more consistent bearing surface under thermal expansion. Manufactured in Germany, it reduces localised pressure and evenly distributes thrust loads to protect against piston collapse during operation.

Features

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  Forged for high strength and durability

  
  


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  Efficient heat transfer from combustion chamber to cylinder wall

  
  


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  Elliptical design ensures even bearing surface under thermal stress

  
  


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  Reduces risk of localised pressure points and piston collapse

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 67.50mm (Actual: 67.44mm)

  
  


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  Compression Height: 29.70mm

  
  


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  Clearance: 0.06mm

  
  


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  Stroke: 69.50mm

  
  


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  Displacement: 249 cm³

  
  


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  Wossner Compression Ratio: 2-stroke

  
  


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  OEM Compression Ratio: 2-stroke

  
  

Cross-Reference OEM Part Numbers

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  Piston Kit: 8014DA

  
  


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  Lock: CW18

  
  


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  Pin: WP033

  
  


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  Ring Set: RSB6750 x2

  
  

Vehicle Fitments

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  KTM GS250 (1995)

  
  


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  KTM SX250 (1995)