This Wossner forged piston kit features a 77mm bore size (76.96mm actual) and is a standard replacement for Kawasaki KX250F models from 2011 to 2014. Manufactured in Germany, the piston is designed with a two-ring configuration and an elliptical shape that promotes even load distribution under thermal expansion. It ensures effective heat transfer and long-term durability in high-performance environments.

Features

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  Forged piston construction with two-ring design for durability and strength

  
  


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  Elliptical profile ensures even thrust load distribution during operation

  
  


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  Engineered for efficient heat transfer from combustion chamber to cylinder walls

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 77mm (actual 76.96mm)

  
  


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  Displacement: 249 cm³

  
  


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  Stroke: 53.60 mm

  
  


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  Clearance: 0.04 mm

  
  


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  Compression Ratio (Wossner): OEM

  
  


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  Compression Ratio (OEM): 13.50:1

  
  


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  Dome Volume: -2.80 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-2

  
  

Cross-Reference OEM Part Numbers

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  13001-0125

  
  


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  40019M07700

  
  

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