This top end gasket set for Beta two-stroke 250 cc and 300 cc 2026 models provides a complete cylinder-unit sealing solution. Supplied as Athena part number P400060600019, the kit is engineered to OEM specifications for precise fit and durable performance in offroad conditions.

Features

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  Validated in MXGP, AMA Supercross, Pro Motocross, and EnduroGP use

  
  


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  Developed in collaboration with leading OEM manufacturers for specification-accurate fit

  
  


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  Withstands mud, sand, dust, and high thermal loads typical of offroad operation

  
  


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  Multi-layer embossing optimised for uniform compression and reliable sealing

  
  


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  Stable sealing performance over extended use

  
  

Specifications

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  Part number: P400060600019

  
  


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  Type: Top end gasket kit (cylinder unit)

  
  


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  Contents: head gasket, base gasket, exhaust gaskets, O-rings, washers

  
  


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  Compatibility: designed to match OEM dimensions and tolerances

  
  


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  Development and validation processes: 2D/3D modelling, Fuji Paper and Tin testing, FEM simulations, static and dynamic test benches

  
  


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  Intended application: offroad two-stroke engines subject to mechanical and thermal stress

  
  

Vehicle Fitments

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  BETA CROSS RX 250 2T 250 cc 2026

  
  


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  BETA CROSS RX 350 2T 350 cc 2026

  
  


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  BETA ENDURO RR 250 2T RACE 250 cc 2026

  
  


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  BETA ENDURO RR 250 2T X-PRO 250 cc 2026

  
  


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  BETA ENDURO RR 300 2T RACE 300 cc 2026

  
  


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  BETA ENDURO RR 300 2T X-PRO 300 cc 2026

  
  


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  BETA ENDURO XTRAINER 250 2T 250 cc 2026

  
  


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  BETA ENDURO XTRAINER 300 2T 300 cc 2026