This Wossner piston kit is designed for Yamaha YZ 65 models from 2018 to 2019. With a bore size of 43.51mm and a +0.01mm oversize, this forged piston offers a precise fit, excellent strength, and reliable heat management. Manufactured in Germany, it is ideal for maintaining engine performance and durability under competitive riding conditions.

Features

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  Forged high-performance piston with skirt coating

  
  


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  Engineered for effective heat transfer from combustion chamber to cylinder walls

  
  


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  Elliptical design ensures uniform bearing surface under thermal expansion

  
  


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  Distributes thrust loads evenly and minimises localised pressure

  
  


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  Prevents piston collapse under high stress

  
  

Specifications

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  Bore size: 43.51mm

  
  


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  Piston Size 43.46

  
  


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  Oversize: +0.01mm

  
  


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  Country of manufacture: Germany

  
  

Cross-Reference OEM Part Numbers

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  Wossner 8306DB

  
  


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  56-W9991.B.WO

  
  

Vehicle Fitments

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  Yamaha YZ 65 2018–2019