This Wossner piston kit is engineered for high-performance applications in the Honda CR250R models from 2005 to 2007. With a 66.42mm bore and 66.37mm specification, it features advanced forging and design principles for enhanced durability and heat dissipation, ensuring reliable performance under demanding two-stroke engine conditions.

Features

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  Forged in Germany for superior strength and precision

  
  


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  Elliptical design improves bearing surface uniformity under heat expansion

  
  


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  Enhances heat transfer from the combustion chamber to cylinder walls

  
  


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  Minimises localised pressure to prevent piston collapse

  
  


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  Specifically designed for Honda CR250R engines

  
  

Specifications

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  Bore: 66.42 mm

  
  


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  Display (Displacement): 249 cm³

  
  


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  Stroke: 72.00 mm

  
  


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  Clearance: 0.06 mm

  
  


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  Compression Ratio (Wossner & OEM): 2-stroke

  
  


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  Compression Height: 38.00 mm

  
  

Cross-Reference OEM Part Numbers

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  Piston Kit: 8171DC

  
  


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  Lock: CW18

  
  


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  Pin: WP033

  
  


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  Ring Set: RDB6640

  
  


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  Rod: P2020

  
  


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  Internal Part No.: 56-W860+00C.WO

  
  

Vehicle Fitments

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  2005 Honda CR250R

  
  


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  2006 Honda CR250R

  
  


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  2007 Honda CR250R