The Wossner 8237DA piston kit with a 47mm bore (46.95mm actual size) is designed for the Honda CR80 models from 1992 to 2002 (US Bore). This forged piston, manufactured in Germany, enhances engine performance by improving heat transfer from the combustion chamber to the cylinder walls. The elliptical design provides a consistent bearing surface during thermal expansion, distributing loads evenly and preventing piston collapse.

Features

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  Forged construction for superior strength and durability

  
  


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  Engineered for efficient heat transfer from combustion chamber to cylinder walls

  
  


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  Elliptical design to ensure uniform load distribution under heat expansion

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore: 47mm (actual size 46.95mm)

  
  


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  Part Number: 56-W643.A.WO

  
  


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  Lock Part Number: CW14

  
  


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  Pin Part Number: WP058

  
  


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  Ring Set Part Number: RSB4700

  
  


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  Displacement: 80 cm³

  
  


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  Stroke: 70.80mm

  
  


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  Clearance: 0.06mm

  
  


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  Wossner Compression Ratio: 2-stroke

  
  


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  OEM Compression Ratio: 2-stroke

  
  


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  Compression Height: 37.00mm

  
  

Cross-Reference OEM Part Numbers

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  13120-GBF-840

  
  


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  13110-GC4-505

  
  


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  643M04700

  
  

Vehicle Fitments

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  1986 Honda CR80

  
  


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  1987 Honda CR80

  
  


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  1988 Honda CR80

  
  


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  1989 Honda CR80

  
  


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  1990 Honda CR80

  
  


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  1991 Honda CR80