This Wossner forged piston kit is a standard-size component designed for KTM EXC500 and Husqvarna FE501 four-stroke engines. With a bore size of 95mm and engineered for high-performance applications, this piston ensures optimal thermal transfer and structural reliability under intense operating conditions.

Features

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  High-strength forged construction for maximum durability

  
  


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  Elliptical profile maintains consistent bearing surface during thermal expansion

  
  


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  Engineered for efficient combustion heat dissipation to cylinder walls

  
  


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  Designed to evenly distribute thrust loads and prevent piston collapse

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 95.00mm

  
  


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  Actual Piston Size: 94.95mm

  
  


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  Display Displacement: 510 cm³

  
  


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  Stroke: 72.00mm

  
  


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  Piston Clearance: 0.05mm

  
  


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  Wossner Compression Ratio: OEM

  
  


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  OEM Compression Ratio: 11.80:1

  
  


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  Dome Volume: -6.80 cm³

  
  


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  Compression Height: 22.80mm

  
  


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  Circlip 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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  Part No: 56-W925.A.WO

  
  


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  Cross Reference: 79630007000, 78730007000, 40064M09500, 76630007000, 40131M09500

  
  

Vehicle Fitments

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  KTM EXC500 (2012– )

  
  


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  Husqvarna FE501 (2014–2016)

  
  


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  Husqvarna FE501 (2017–2019)