This Wossner forged piston kit features a 95mm bore size (94.95mm actual) and is a standard fitment for KTM SX-F450 models from 2013 to 2018, as well as multiple Husqvarna 450 models. Manufactured in Germany, the piston includes a two-ring configuration and an elliptical design to promote even load distribution and superior heat transfer. It is engineered for durability and consistent performance under demanding conditions.

Features

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  Forged piston with two-ring design for enhanced strength and reliability

  
  


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  Elliptical shape distributes thrust loads evenly under heat expansion

  
  


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  Optimised for efficient combustion heat transfer to cylinder walls

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 95mm (actual 94.95mm)

  
  


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  Displacement: 449 cm³

  
  


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  Stroke: 60.80 mm

  
  


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  Clearance: 0.05 mm

  
  


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  Compression Ratio (Wossner): OEM

  
  


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  Compression Ratio (OEM): 12.60:1

  
  


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  Dome Volume: +1.00 cm³

  
  


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  Compression Height: 22.80 mm

  
  


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  Lock Part Number: CW19

  
  


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  Pin Part Number: WP071

  
  


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  Ring Set Part Number: 950ADS-2

  
  

Cross-Reference OEM Part Numbers

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  78930007300

  
  


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  40073M09500

  
  

Vehicle Fitments

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  KTM SX-F450 (2013–2018)

  
  


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  Husqvarna FC450 (2014–2015)

  
  


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  Husqvarna FC450 (2016–2020)

  
  


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  Husqvarna FX450 (2017–2020)

  
  


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  Husqvarna FS450 (2015)

  
  


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  Husqvarna FS450 (2016–2020)