This Wossner forged high-compression piston kit features a 77.01mm bore size (76.97mm actual), providing a +0.01mm oversize option for Kawasaki KX250F models from 2011 to 2014. Engineered in Germany, it includes a hard Teflon skirt coating for improved cylinder conformity and long-term reliability. With a two-ring setup and elliptical design, the piston ensures balanced load distribution and efficient thermal performance.

Features

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  Forged high-compression piston with two-ring design

  
  


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  Elliptical profile for uniform pressure distribution under heat expansion

  
  


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  Hard Teflon skirt coating enhances cylinder fit and wear resistance

  
  


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  Engineered for superior heat transfer efficiency

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 77.01mm (actual 76.97mm)

  
  


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  Displacement: 250 cm³

  
  


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  Stroke: 53.60 mm

  
  


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  Clearance: 0.04 mm

  
  


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  Compression Ratio (Wossner): 14.20:1

  
  


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  Compression Ratio (OEM): 13.50:1

  
  


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  Dome Volume: -1.70 cm³

  
  


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  Compression Height: 19.60 mm

  
  


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  Lock Part Number: CW16

  
  


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  Pin Part Number: WP070

  
  


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  Ring Set Part Number: 770XAS-S

  
  

Cross-Reference OEM Part Numbers

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  56-W952.B.WO.HC

  
  

Vehicle Fitments

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  2011 Kawasaki KX250F

  
  


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  2012 Kawasaki KX250F

  
  


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  2013 Kawasaki KX250F

  
  


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  2014 Kawasaki KX250F