This Wossner piston kit with a 66.42mm bore (+0.02mm oversize) is engineered for KTM SX250 models from 2000 to 2002. Made from high-strength forged material, this piston is built to perform under extreme thermal and mechanical conditions common in high-performance 2-stroke engines.

Features

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  Forged piston construction for enhanced durability and load resistance

  
  


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  Engineered to facilitate efficient heat transfer from combustion chamber to cylinder wall

  
  


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  Elliptical design ensures consistent bearing surface during thermal expansion

  
  


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  Reduces localised pressure points to prevent piston collapse

  
  


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  Precision manufactured in Germany

  
  

Specifications

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  Bore: 66.42 mm

  
  


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  Actual piston size: 66.36 mm

  
  


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  Stroke: 72.00 mm

  
  


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  Display volume: 249 cm³

  
  


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  Clearance: 0.06 mm

  
  


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  Compression ratio: 2-stroke (Wossner and OEM)

  
  


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  Compression height: 38.00 mm

  
  

Cross-Reference OEM Part Numbers

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  Piston Kit: 8090DC

  
  


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  Lock: CW18

  
  


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  Pin: WP033

  
  


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  Ring Set: RSB6640

  
  


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  Part No: 56-W774.C.WO

  
  

Vehicle Fitments

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  KTM SX250 2000

  
  


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  KTM SX250 2001

  
  


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  KTM SX250 2002