This Wossner piston kit with a 72mm bore is a standard replacement for the Honda CB1100F and CB1100R models from 1982 to 1984. Manufactured in Germany, the forged piston design ensures high strength and optimal heat transfer performance. Its elliptical profile minimises stress by evenly distributing thermal expansion forces, enhancing engine durability.

Features

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  Forged construction for enhanced strength and reliability

  
  


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  Designed for efficient combustion heat transfer to cylinder walls

  
  


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  Elliptical shape ensures uniform bearing surface under thermal expansion

  
  


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  Even thrust load distribution helps prevent piston collapse

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore: 72.00mm (Standard)

  
  


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  Actual bore: 71.94mm

  
  


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  Display volume: 1123 cm³

  
  


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  Stroke: 69.00mm

  
  


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  Clearance: 0.06mm

  
  


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  Wossner compression ratio: 10.00:1

  
  


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  OEM compression ratio: 9.70:1

  
  


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  Dome volume: +3.70 cm³

  
  


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  Compression height: 25.40mm

  
  

Cross-Reference OEM Part Numbers

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  56-W9806.70.EA

  
  


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  8561DA

  
  

Vehicle Fitments

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  Honda CB1100F (1982–1984)

  
  


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  Honda CB1100R (1982–1984)