This 72mm bore Wossner piston kit (part number 8219DA) is a standard size forged piston specifically engineered for KTM 300cc two-stroke engines produced between 2004 and 2007. It is designed for optimal combustion efficiency, durability, and heat transfer, making it suitable for high-performance off-road applications.

Features

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  Forged piston construction for increased strength and durability

  
  


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  Engineered to optimise combustion chamber heat transfer

  
  


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  Elliptical design enhances bearing surface and distributes thrust loads evenly

  
  


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  Helps prevent piston collapse under heat expansion

  
  


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  Made in Germany

  
  

Specifications

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  Bore diameter: 72.00 mm

  
  


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  Display displacement: 293 cm³

  
  


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  Stroke: 72.00 mm

  
  


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  Clearance: 0.06 mm

  
  


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  Compression ratio: 2-stroke specification (Wossner and OEM)

  
  


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  Compression height: 38.00 mm

  
  

Cross-Reference OEM Part Numbers

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  55430007000

  
  


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  09104880

  
  


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  858M07200

  
  

Included Components

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  Piston kit part number: 56-W858.A.WO

  
  


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  Rings (2x): RSB7200

  
  


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  Circlip: CW18

  
  


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  Wrist pin: WP033

  
  


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  Gasket: D2024-EST

  
  


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  Connecting rod: P2023

  
  

Vehicle Fitments

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  KTM EXC 300 2004–2007

  
  


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  KTM MXC 300 2004–2007

  
  


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  KTM XC 300 2004–2007

  
  


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  KTM XC-W 300 2004–2007