This Wossner forged piston kit K8734DA-4 features a standard 81.00mm bore and is specifically designed for SUZUKI HAYABUSA TURBO GSX R 1300 models from 1999 to 2007. Supplied as a set of four pistons, the kit is optimised for turbocharged applications, offering a reduced compression ratio to support forced induction while maintaining strength and reliability under extreme operating conditions. Manufactured in Germany, it ensures exceptional thermal efficiency and structural integrity.

Features

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  Forged piston construction designed for high-performance turbocharged engines

  
  


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  Engineered for effective heat transfer from the combustion chamber to cylinder walls

  
  


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  Elliptical profile supports even expansion and thrust load distribution

  
  


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  Minimises localised pressure and prevents piston collapse

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore: 81.00mm (STD)

  
  


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  Piston code: Wossner K8734DA-4

  
  


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  Clip part number: CW20

  
  


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  Piston pin: WP065

  
  


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  Ring set: RIK81.00A

  
  


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  Displacement: 1299 / 1362 cm³

  
  


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  Stroke: 63.00 mm

  
  


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  Clearance: 0.07 mm

  
  


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  Wossner compression ratio: 9.00:1

  
  


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  OEM compression ratio: 11.00:1

  
  


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  Dome volume: -17.80 cm³

  
  


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  Compression height: 26.80 mm

  
  

Cross-Reference OEM Part Numbers

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  Part No. 56-W9894.000.WO

  
  

Vehicle Fitments

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  SUZUKI HAYABUSA TURBO GSX R 1300 1999–2007