This Wossner forged piston kit with a 66.42mm bore (+0.02mm oversize) is engineered for Honda CR250R models from 2002 to 2004. Manufactured in Germany, it is built for reliability and performance in two-stroke engines. The piston’s elliptical design and precision machining enhance load distribution and thermal efficiency, making it a dependable solution for performance rebuilds.

Features

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  Forged construction for high strength and durability

  
  


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  Designed to optimise heat transfer from the combustion chamber to cylinder walls

  
  


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  Elliptical profile distributes load evenly, preventing localised stress and piston collapse

  
  


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  Made in Germany

  
  

Specifications

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  Bore: 66.42mm

  
  


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  Actual Bore: 66.36mm

  
  


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  Engine Displacement: 249 cm³

  
  


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  Stroke: 72.00mm

  
  


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  Clearance: 0.06mm

  
  


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  Compression Ratio: 2-stroke (Wossner and OEM)

  
  


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  Compression Height: 38.00mm

  
  


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  Lock Part Number: CW18

  
  


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  Pin Part Number: WP033

  
  


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  Ring Set Part Number: RSB6640 x 2

  
  


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  Rod Part Number: P2020

  
  

Vehicle Fitments

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  2002 Honda CR250R

  
  


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  2003 Honda CR250R

  
  


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  2004 Honda CR250R