This Wossner forged piston kit is a +2.00mm oversize replacement specifically designed for Yamaha PW50 models from 1981 to 1995. Ideal for engines requiring a substantial overbore, this kit delivers reliable performance and superior strength in two-stroke applications.

Features

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  Forged piston construction ensures maximum strength and longevity

  
  


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  Elliptical design provides a consistent bearing surface during thermal expansion

  
  


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  Optimised for efficient heat transfer from the combustion chamber to cylinder walls

  
  


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  Reduces risk of piston collapse by evenly distributing thrust loads

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 42.00mm

  
  


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  Actual Piston Size: 41.95mm

  
  


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  Stroke: 39.20mm

  
  


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  Piston Clearance: 0.05mm

  
  


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  Wossner Compression Ratio: 2-stroke

  
  


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  OEM Compression Ratio: 2-stroke

  
  


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  Compression Height: 24.90mm

  
  


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  Lock Part Number: CW10

  
  


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  Pin Part Number: WP105

  
  


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  Ring Set Part Number: RSB4200

  
  

Cross-Reference OEM Part Numbers

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  Part No: 8267D200

  
  

Vehicle Fitments

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  Yamaha PW50 (1981–1995)