This Wossner forged high-compression piston kit features a 76.81mm bore size (76.77mm actual), offering a +0.01mm oversize fitment for Honda CRF250R models from 2014 to 2015. Made in Germany, the piston includes a high-compression dome and an elliptical profile for even thrust load distribution, ensuring reliable performance and durability in high-stress conditions.

Features

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  Forged high-compression piston with precision +0.01mm oversize

  
  


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  Elliptical design ensures even pressure distribution under thermal expansion

  
  


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  Optimised for combustion heat transfer and structural integrity

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 76.81mm (actual 76.77mm)

  
  


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  Displacement: 249 cm³

  
  


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  Stroke: 53.80 mm

  
  


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  Clearance: 0.04 mm

  
  


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  Compression Ratio (Wossner): 14.50:1

  
  


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  Compression Ratio (OEM): 13.50:1

  
  


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  Dome Volume: +0.10 cm³

  
  


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  Compression Height: 28.00 mm

  
  


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  Theoretical Weight: 19.00 g

  
  


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  Lock Part Number: CW16

  
  


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  Pin Part Number: WP070

  
  


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  Ring Set Part Number: 768XAS

  
  

Cross-Reference OEM Part Numbers

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  56-W958.B.WO.HC

  
  

Vehicle Fitments

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  2014 Honda CRF250R

  
  


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  2015 Honda CRF250R