This Wossner forged piston kit with a 54.00mm bore is a standard size replacement for the 2003 Kawasaki KX125. Designed for durability and optimal performance in two-stroke engines, this German-made piston ensures effective heat dissipation and consistent load distribution under high thermal and mechanical stress, making it suitable for racing and performance applications.

Features

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  Forged construction offers high strength and long-term reliability

  
  


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  Designed to maximise combustion chamber heat transfer to cylinder walls

  
  


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  Elliptical profile distributes thrust loads evenly, preventing localised pressure and piston collapse

  
  


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  Made in Germany

  
  

Specifications

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  Bore: 54.00mm

  
  


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  Actual Bore: 53.95mm

  
  


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  Engine Displacement: 125 cm³

  
  


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  Stroke: 54.50mm

  
  


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  Clearance: 0.05mm

  
  


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  Compression Ratio: 2-stroke (Wossner and OEM)

  
  


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  Compression Height: 29.30mm

  
  


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  Lock Part Number: CW15

  
  


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  Pin Part Number: WP032

  
  


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  Ring Set Part Number: RSB5400

  
  


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  Rod Part Number: P2010

  
  

Cross-Reference OEM Part Numbers

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  13001-1634

  
  


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  822M05400

  
  

Vehicle Fitments

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  Kawasaki KX125 2003