Wossner Forged Piston Kit 68.00mm Bore – KTM GS250 / SX250 (1990–1994)

This Wossner forged piston kit is designed for KTM GS250 and SX250 models from 1990 to 1994. It features a 68.00 mm bore and a piston diameter of 67.94 mm (+0.50 mm oversize), suitable for high-performance 2-stroke applications. The piston’s forged construction and elliptical design ensure optimal heat transfer, even thrust distribution, and high durability under thermal expansion. Made in Germany with precision engineering.

Features

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  Forged piston for enhanced strength and longevity

  
  


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  Superior heat dissipation from the combustion chamber

  
  


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  Elliptical design promotes balanced thrust load and prevents piston collapse

  
  


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  Precision manufactured in Germany

  
  

Specifications

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  Bore Size: 68.00 mm

  
  


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  Piston Diameter: 67.94 mm

  
  


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  Engine Displacement: 249 cm³

  
  


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  Stroke: 69.50 mm

  
  


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  Clearance: 0.06 mm

  
  


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  Compression Height: 29.70 mm

  
  


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  Compression Ratio: 2-stroke (Wossner and OEM)

  
  

Cross-Reference Wossner Part Numbers

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  Piston Kit: 8005D050

  
  


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  Lock: CW18

  
  


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  Pin: WP033

  
  


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  Ring Set: RSB6800 x 2

  
  

Vehicle Fitments

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  KTM GS250 (1990–1994)

  
  


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  KTM SX250 (1990–1994)