This Wossner forged piston kit is a standard replacement designed for Harley-Davidson Buell X9BR and X9BS models from 2002 to 2008, including the XB9R Firebolt and XB9S Lightning. Manufactured in Germany, the pistons feature a domed design with a 10:1 compression ratio, providing high strength and excellent thermal management. The kit includes two skirt-coated forged pistons, rings, clips, and pins.

Features

• 
  

  Forged construction for superior strength and reliability

  
  


• 
  

  Skirt-coated for reduced friction and wear

  
  


• 
  

  Designed for optimal combustion heat transfer to cylinder walls

  
  


• 
  

  Elliptical design ensures uniform bearing surface during thermal expansion

  
  


• 
  

  Domed piston with 10:1 compression ratio

  
  


• 
  

  Manufactured in Germany

  
  

Specifications

• 
  

  Bore: 3.501" (Standard)

  
  


• 
  

  Compression ratio: 10:1 (domed)

  
  


• 
  

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

  
  


• 
  

  Ring Set Part Number: 890XSY

  
  

Cross-Reference OEM Part Numbers

• 
  

  56-W9864.000.WO

  
  


• 
  

  K8623DA-2

  
  

Vehicle Fitments

• 
  

  Harley-Davidson Buell X9BR (2002–2008)

  
  


• 
  

  Harley-Davidson Buell X9BS (2002–2008)

  
  


• 
  

  Buell XB9R Firebolt

  
  


• 
  

  Buell XB9S Lightning