The Wossner 8114D150 piston kit features a 57.50mm bore (actual 57.44mm) and is designed for outstanding strength and efficient heat transfer to the cylinder walls. The forged, elliptically designed piston promotes a uniform bearing surface during heat expansion, reducing localised pressure and evenly distributing thrust loads to prevent piston collapse. Manufactured in Germany, this kit includes essential components for dependable performance and fits Yamaha YZ125 models from 1990 to 1993.

Features

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  Forged piston construction for superior strength and durability

  
  


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  Optimised design for effective combustion chamber heat transfer

  
  


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  Elliptical shape ensures uniform bearing surface under heat expansion

  
  


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  Reduces localised pressure and prevents piston collapse

  
  


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  Made in Germany

  
  

Specifications

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  Bore Size: 57.50mm (Actual 57.44mm)

  
  


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  Display (cm³): 124

  
  


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  Stroke (mm): 50.70

  
  


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  Clearance (mm): 0.06

  
  


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  Compression Ratio (Wossner 2-stroke): 2 stroke

  
  


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  Compression Ratio (OEM 2-stroke): 2 stroke

  
  


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  Compression Height (mm): 28.00

  
  

Cross-Reference OEM Part Numbers

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  Wossner Piston Kit Part No: 8114D150

  
  


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  Lock Part No: CW16

  
  


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  Pin Part No: WP036

  
  


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  Ring Set Part No: RSB5750

  
  


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  Rod Part No: P2047

  
  

Vehicle Fitments

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  1990 Yamaha YZ125

  
  


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  1991 Yamaha YZ125

  
  


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  1992 Yamaha YZ125

  
  


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  1993 Yamaha YZ125