This Wossner forged high-compression piston kit features a 77.02mm bore size (76.98mm actual), offering a +0.02mm oversize fitment for the 2010 Kawasaki KX250F. Built in Germany with a two-ring configuration, the piston includes an elliptical design for even thrust distribution and a high-compression dome for enhanced performance. It also features improved thermal efficiency and a hard Teflon-coated skirt for optimal bore conformity.

Features

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  Forged high-compression piston with two-ring configuration

  
  


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  Elliptical shape ensures even load distribution under heat expansion

  
  


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  Engineered for optimal combustion heat transfer

  
  


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  Includes hard Teflon skirt coating for bore adaptability

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 77.02mm (actual 76.98mm)

  
  


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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): 13.90:1

  
  


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  Compression Ratio (OEM): 13.20:1

  
  


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  Dome Volume: -1.40 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

  
  


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  Rod Part Number: P4002

  
  

Cross-Reference OEM Part Numbers

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  OEM: 13001-0115

  
  


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  Wiseco: 40009M

  
  


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  Vertex: 23566

  
  


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  ProX: 01.4340

  
  

Vehicle Fitments

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  2010 Kawasaki KX250F