The Wossner K8721DA-2 piston kit is a standard-size forged piston set designed for the 2009 Kawasaki EX650 Ninja. With an 84.00mm bore and 12.6:1 compression ratio, these pistons are engineered for performance and durability in high-compression four-stroke applications. Manufactured in Germany, this kit includes pistons, clips, and pins but requires the use of OEM rings.

Features

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  Forged high-performance pistons with PTFE-coated skirts

  
  


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  Elliptical design ensures even load distribution and thermal expansion

  
  


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  Enhanced heat transfer from combustion chamber to cylinder walls

  
  


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  Polished crown surfaces to help resist detonation and prevent hot spots

  
  


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  Designed to use OEM ring sets

  
  


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  Includes piston pins and clips

  
  

Specifications

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  Bore size: 84.00mm (Standard)

  
  


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  Measured bore: 83.95mm

  
  


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  Compression ratio: 12.6:1

  
  


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  Quantity: 2 pistons per kit

  
  


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  Made in Germany

  
  

Cross-Reference OEM Part Numbers

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  Part No. 56-W9869.000.WO

  
  


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  Clip: CW19

  
  


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  Piston Pin: WP028

  
  


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  Ring Set: Use OEM

  
  

Vehicle Fitments

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  Kawasaki EX650 Ninja 2009