This Wossner piston kit with an 85mm bore is an oversized replacement for Kawasaki ZX12 models from 2000 to 2005, including turbocharged applications. Forged in Germany, it provides exceptional strength and thermal performance. The elliptical design supports even expansion and stress distribution, minimising the risk of piston collapse in high-stress environments.

Features

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  Forged construction for enhanced durability and strength

  
  


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  Engineered for efficient heat transfer from combustion chamber to cylinder walls

  
  


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  Elliptical profile ensures uniform bearing surface during thermal expansion

  
  


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  Evenly distributes thrust loads to prevent localised pressure

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore: 85mm

  
  


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  Actual bore: 84.93mm

  
  


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  Display volume: 1198 / 1257 cm³

  
  


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  Stroke: 55.40mm

  
  


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  Clearance: 0.07mm

  
  


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  Wossner compression ratio: 9.80:1

  
  


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  OEM compression ratio: 12.20:1

  
  


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  Dome volume: -9.80 cm³

  
  


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  Compression height: 25.00mm

  
  

Cross-Reference OEM Part Numbers

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  56-W9815.85.WO

  
  


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  K8779D200-4

  
  

Vehicle Fitments

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  Kawasaki ZX12 (2000–2005)