This Wossner forged piston kit features a 77.01mm bore size (76.97mm actual), offering a +0.01mm oversize fitment for the 2010 Kawasaki KX250F. Precision-manufactured in Germany, the piston includes a two-ring design and an elliptical shape that distributes thrust loads evenly, minimising stress and wear during engine operation. It maintains OEM compression characteristics for reliable performance.

Features

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  Forged piston with two-ring configuration for strength and durability

  
  


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  Elliptical design promotes even load distribution during thermal expansion

  
  


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  Engineered for efficient combustion heat transfer to cylinder walls

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 77.01mm (actual 76.97mm)

  
  


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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): OEM

  
  


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  Compression Ratio (OEM): 13.20:1

  
  


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  Dome Volume: -2.50 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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  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