This Wossner forged piston kit with a 39.50mm bore is a standard size replacement for KTM SX50 models from 2009 to 2020 and Husqvarna TC50 models from 2017 to 2020. Designed for performance and durability in small-displacement two-stroke engines, the piston is manufactured in Germany and features advanced engineering for optimal thermal transfer and load distribution.

Features

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  Forged construction ensures superior strength and resistance to high loads

  
  


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  Designed to maximise heat transfer from combustion chamber to cylinder walls

  
  


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  Elliptical profile distributes pressure evenly, reducing risk of piston collapse

  
  


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  Made in Germany

  
  

Specifications

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  Bore: 39.50mm

  
  


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  Actual Bore: 39.46mm

  
  


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  Engine Displacement: 50 cm³

  
  


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  Stroke: 40.00mm

  
  


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  Clearance: 0.04mm

  
  


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  Compression Ratio: 2-stroke (Wossner and OEM)

  
  


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  Compression Height: 21.60mm

  
  


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  Lock Part Number: CW12

  
  


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  Pin Part Number: WP101

  
  


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  Ring Set Part Number: RSB2950

  
  


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  Rod Part Number: P2053

  
  

Cross-Reference OEM Part Numbers

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  45230007000 I

  
  


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  45230038000

  
  


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  09104899

  
  


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  874M03950

  
  


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  45230015000

  
  

Vehicle Fitments

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  2009–2020 KTM SX50

  
  


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  2017–2020 Husqvarna TC50