This Wossner piston kit with a 66.41mm bore (+0.01mm oversize) is precision-engineered for KTM SX250 models from 2000 to 2002. Built from forged material, it provides enhanced strength, heat resistance, and consistent performance for demanding 2-stroke applications.

Features

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  Forged piston ensures high strength and durability

  
  


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  Designed for optimal combustion chamber heat transfer to the cylinder wall

  
  


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  Elliptical profile offers consistent bearing surface during expansion

  
  


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  Minimises localised stress to prevent piston collapse under high load

  
  


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  Manufactured in Germany to precise engineering standards

  
  

Specifications

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  Bore: 66.41 mm

  
  


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  Actual piston size: 66.35 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: 8090DB

  
  


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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.B.WO

  
  

Vehicle Fitments

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  KTM SX250 2000

  
  


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  KTM SX250 2001

  
  


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  KTM SX250 2002