This Wossner forged piston kit with a 39.51mm bore (+0.01mm oversize) is designed for KTM SX50 models from 2009 to 2018. Engineered for enhanced strength and consistent performance in small-displacement two-stroke engines, this piston is manufactured in Germany and features advanced geometry for efficient heat dissipation and balanced thrust load distribution.

Features

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  Forged for maximum durability and strength

  
  


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  Engineered to optimise heat transfer to the cylinder walls

  
  


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  Elliptical design provides a uniform bearing surface, reducing localised stress

  
  


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  Made in Germany

  
  

Specifications

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  Bore: 39.51mm

  
  


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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

  
  

Vehicle Fitments

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  2009 KTM SX50

  
  


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  2010 KTM SX50

  
  


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  2011 KTM SX50

  
  


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  2012 KTM SX50

  
  


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  2013 KTM SX50

  
  


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  2014 KTM SX50

  
  


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  2015 KTM SX50

  
  


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  2016 KTM SX50

  
  


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  2017 KTM SX50

  
  


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  2018 KTM SX50