This Wossner forged high-compression piston kit features a 77mm bore size (76.96mm actual) and is designed for Kawasaki KX250F models from 2011 to 2014. The piston includes a hard Teflon skirt coating for improved fit and bore conformity. Manufactured in Germany with a two-ring configuration, it enhances combustion efficiency and strength under pressure. The elliptical design ensures even load distribution during thermal expansion.

Features

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  Forged high-compression piston with two-ring setup

  
  


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  Elliptical profile for balanced thrust load distribution

  
  


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  Engineered for optimal heat transfer to cylinder walls

  
  


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  Hard Teflon skirt coating for superior fit and bore adaptability

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 77mm (actual 76.96mm)

  
  


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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

  
  

Cross-Reference OEM Part Numbers

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  13001-0125

  
  


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  40020M07700

  
  

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