This Wossner forged piston kit features an 88mm bore size (87.95mm actual) and is a standard fitment for a range of KTM and Husaberg 350cc four-stroke models. Manufactured in Germany, the piston incorporates an elliptical design for even thrust load distribution and efficient heat transfer. Designed for reliability under demanding conditions, it meets OEM compression specifications and includes all key components for installation.

Features

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  Forged piston construction for strength and durability

  
  


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  Elliptical profile ensures uniform bearing surface during thermal expansion

  
  


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  Optimised for effective heat transfer from combustion chamber to cylinder walls

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 88mm (actual 87.95mm)

  
  


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  Displacement: 349 cm³

  
  


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  Stroke: 57.50 mm

  
  


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  Clearance: 0.05 mm

  
  


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  Compression Ratio (Wossner): OEM

  
  


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  Compression Ratio (OEM): 12.30:1

  
  


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  Dome Volume: -0.10 cm³

  
  


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  Compression Height: 20.50 mm

  
  


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  Lock Part Number: CW18

  
  


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  Pin Part Number: WP054

  
  


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  Ring Set Part Number: 880XSY

  
  


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  Rod Part Number: P4061

  
  

Cross-Reference OEM Part Numbers

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  77230107100-I

  
  


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  40056M08800

  
  


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  77530107100

  
  

Vehicle Fitments

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  KTM 350 EXC-F (2012–2015)

  
  


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  KTM 350 XC-F (2012–2015)

  
  


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  KTM 350 XCF-W (2012–2015)

  
  


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  KTM Freeride 350 (2012–2014)

  
  


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  Husaberg FE350 (2013–2014)

  
  


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  Husqvarna FE350 (2014)