This Wossner piston kit with a 78mm bore is an oversized (+2.00mm) replacement for Kawasaki Z11 (ZX11) models from 1990 to 2001. Forged in Germany, it is engineered for strength and optimal thermal performance. The elliptical design allows for uniform expansion, even pressure distribution, and reduced risk of piston collapse during operation under high stress.

Features

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  Forged construction for superior strength and reliability

  
  


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  Designed for effective heat transfer from combustion chamber to cylinder walls

  
  


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  Elliptical profile ensures consistent bearing surface under heat expansion

  
  


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  Even distribution of thrust loads prevents localised stress

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore: 78mm (+2.00mm Oversize)

  
  


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  Actual bore: 77.95mm

  
  


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  Display volume: 1080 / 1109 cm³

  
  


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  Stroke: 58.00mm

  
  


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  Clearance: 0.06mm

  
  


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  Wossner compression ratio: OEM

  
  


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  OEM compression ratio: 11.00:1

  
  


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  Dome volume: -3.70 cm³

  
  


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  Compression height: 25.00mm

  
  


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  Theoretical weight: 209.00g

  
  


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  Lock Part Number: CW18

  
  


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  Pin Part Number: WP031

  
  


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  Ring Set Part Number: 780XDS

  
  

Cross-Reference OEM Part Numbers

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  56-W9814.78.WO

  
  


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  K8801D200-4

  
  

Vehicle Fitments

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  Kawasaki Z11 (ZX11) (1990–2001)