This Wossner forged high-compression piston kit features a 77mm bore size (76.96mm actual) and is designed for the 2010 Kawasaki KX250F. Manufactured in Germany, it includes a two-ring configuration and a high-compression dome for increased performance. The elliptical design ensures consistent load distribution, while efficient heat transfer supports durability under high-stress conditions.

Features

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  Forged high-compression piston with two-ring design

  
  


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  Elliptical profile ensures even thrust load distribution under heat expansion

  
  


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  Designed for optimal combustion heat transfer 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: 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

  
  

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

  
  


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  Wiseco: 40010M07700

  
  

Vehicle Fitments

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  2010 Kawasaki KX250F