Athena standard bore cylinder kit (part reference P400270100028) for 250 cc four-stroke applications, supplied with a 78 mm bore cylinder, forged piston, pin, rings, and complete gasket set. Designed to match original engine specifications for direct fit with no modifications required.

Features

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  Standard bore cylinder kit Ø 78 mm, 250 cc

  
  


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  High-grade aluminium cylinder for heat transfer and wear resistance

  
  


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  Forged piston, CNC-machined

  
  


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  Molybdenum disulphide piston coating to reduce friction and noise

  
  


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  Piston pin and rings included, manufactured from aerospace-grade materials

  
  


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  Complete gasket set included

  
  


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  MLS head gasket, laser-cut stainless steel for high-pressure sealing

  
  


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  Designed to match OEM specifications

  
  


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  No modifications required for installation

  
  


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  Athena part reference: P400270100028

  
  

Specifications

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  Bore diameter: 78.00 mm

  
  


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  Displacement: 249.00 cc

  
  

Vehicle Fitments

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  GAS GAS EC F 250 cc (2021–2023)

  
  


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  HUSQVARNA FC 250 cc (2021)

  
  


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  HUSQVARNA FE 250 cc (2020–2023)

  
  


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  KTM EXC-F 250 cc (2020–2023)