This Wossner forged high-compression piston kit features a 95mm bore size (94.95mm actual), designed as a standard fitment for KTM SX-F450 models from 2013 to 2018 and a range of Husqvarna Pro Series 450 models. Manufactured in Germany, the piston includes a two-ring configuration and elliptical shape for even load distribution and enhanced heat dissipation. With a high-compression dome, it increases performance in competitive applications.

Features

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  Forged high-compression piston with two-ring design

  
  


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  Elliptical profile distributes thrust loads evenly under heat expansion

  
  


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  Optimised for superior combustion heat transfer and durability

  
  


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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: 84.00 mm

  
  


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  Clearance: 0.05 mm

  
  


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  Compression Ratio (Wossner): 13.60:1

  
  


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  Compression Ratio (OEM): 12.60:1

  
  


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  Dome Volume: +4.10 cm³

  
  


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  Compression Height: 22.80 mm

  
  

Cross-Reference OEM Part Numbers

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  78930007300

  
  


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  40117M09500

  
  


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  RC902M09500

  
  

Vehicle Fitments

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  KTM SX-F450 (2013–2018)

  
  


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  Husqvarna FC450 Pro Series (2014–2015)

  
  


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  Husqvarna FC450 Pro Series (2016–2020)

  
  


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  Husqvarna FS450 Pro Series (2015)

  
  


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  Husqvarna FS450 Pro Series (2016–2020)

  
  


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  Husqvarna FX450 Pro Series (2017–2020)