This Wossner forged piston kit with a 3.521" bore is an oversized (+0.50mm / +0.019") replacement for Harley-Davidson Buell X9BR and X9BS models from 2002 to 2008, including the XB9R Firebolt and XB9S Lightning. Designed and manufactured in Germany, the pistons offer exceptional strength, thermal efficiency, and reliability. The domed design provides a 10:1 compression ratio, and the kit includes all essential components for installation.

Features

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  Forged construction for maximum durability and performance

  
  


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  Skirt-coated to reduce friction and wear

  
  


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  Engineered for effective combustion chamber heat transfer

  
  


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  Elliptical profile ensures even load distribution during heat expansion

  
  


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  Domed piston with 10:1 compression ratio

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore: 3.521" (+0.50mm / +0.019" Oversize)

  
  


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  Compression ratio: 10:1 (domed)

  
  


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  Includes: 2 forged pistons, rings, clips, and pins

  
  


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  Ring Set Part Number: 895XSY

  
  

Cross-Reference OEM Part Numbers

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  56-W9864.050.WO

  
  


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  K8623D050-2

  
  

Vehicle Fitments

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  Harley-Davidson Buell X9BR (2002–2008)

  
  


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  Harley-Davidson Buell X9BS (2002–2008)

  
  


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  Buell XB9R Firebolt

  
  


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  Buell XB9S Lightning