This Wossner forged piston kit with a 39.51mm bore (+0.01mm oversize) is designed for KTM SX50 models. While the bore specification aligns with models from 2001 to 2008, the product description indicates a fitment for 2009 to 2018. Engineered for two-stroke performance, this German-made piston ensures excellent thermal transfer and structural reliability through its elliptical design and high-quality materials.

Features

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  Forged construction delivers superior durability and resistance to mechanical stress

  
  


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  Optimised heat transfer from the combustion chamber to the cylinder walls

  
  


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  Elliptical design ensures even load distribution, reducing localised pressure and the risk of piston collapse

  
  


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  Manufactured 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: RSB3950

  
  

Cross-Reference OEM Part Numbers

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  Not specified

  
  

Vehicle Fitments

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  2001 KTM SX50

  
  


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  2002 KTM SX50

  
  


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  2003 KTM SX50

  
  


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  2004 KTM SX50

  
  


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  2005 KTM SX50

  
  


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  2006 KTM SX50

  
  


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  2007 KTM SX50

  
  


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  2008 KTM SX50

  
  


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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