This Wossner forged piston kit K8733D400-4 features an 85.00mm bore (+4.00mm oversize) and is specifically engineered for SUZUKI HAYABUSA GSX R 1300 models from 2008 to 2016. Supplied as a set of four high-compression 3-ring pistons, this oversized kit is designed to significantly increase engine displacement and maintain reliability in high-performance or turbocharged setups. Manufactured in Germany, it offers superior heat management, structural integrity, and precision fitment.

Features

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  Forged 3-ring piston construction for enhanced strength in high-performance applications

  
  


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  Optimised heat transfer from combustion chamber to cylinder walls

  
  


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  Elliptical design ensures uniform expansion and distributes thrust loads evenly

  
  


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  Prevents piston collapse by reducing localised pressure points

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore: 85.00mm (+4.00mm oversize)

  
  


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  Piston code: Wossner K8733D400-4

  
  


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  Clip part number: CW18

  
  


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  Piston pin: WP054

  
  


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  Ring set: 850XDS

  
  


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  Displacement options: 1340 / 1406 / 1440 / 1474 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-W9895.400.WO

  
  

Vehicle Fitments

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  SUZUKI HAYABUSA GSX R 1300 2008–2016