This Wossner forged piston kit features a 77.02mm bore size (76.98mm actual), offering a +0.02mm oversize specification for Kawasaki KX250F models from 2011 to 2014. Built with a two-ring design and precision-manufactured in Germany, the piston provides reliable performance under thermal and mechanical stress. Its elliptical shape promotes balanced thrust force distribution and efficient heat transfer.

Features

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  Forged piston with two-ring configuration for enhanced strength and durability

  
  


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  Elliptical design ensures uniform bearing surface during heat expansion

  
  


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  Engineered for effective combustion heat dissipation

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 77.02mm (actual 76.98mm)

  
  


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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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  56-W952.C.WO

  
  

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