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    ATHENA Cylinder Head Insert ref. P400485200002 for FANTIC XE 125, XX 125 and YAMAHA YZ 125 2022-2027
    ATHENA Cylinder Head Insert ref. P400485200002 for FANTIC XE 125, XX 125 and YAMAHA YZ 125 2022-2027

    ATHENA Cylinder Head Insert ref. P400485200002 for FANTIC XE 125, XX 125 and YAMAHA YZ 125 2022-2027

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    €161.90
    Tax Included
    Disponible en nuestro proveedor, enviado en 10 a 15 días.

    ATHENA cylinder head insert for FANTIC XE 125, XX 125 and YAMAHA YZ 125 from 2022 to 2027.

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    In stock

    Disponible en nuestro proveedor, enviado en 10 a 15 días.

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      The ATHENA P400485200002 cylinder head insert is designed for FANTIC XE 125, XX 125 and YAMAHA YZ 125 from 2022 to 2027. On a VHM cylinder head, the combustion chamber is an interchangeable insert (or dome). Changing the insert changes the chamber volume, and therefore the compression ratio, without modifying the head: you adapt the engine to the fuel, the terrain and your riding.

      Specifications

      • Brand: ATHENA
      • Manufacturer part number: P400485200002
      • EAN code: 8050506053828
      • For ATHENA cylinder kit ref. P400485100100 (Ø54 mm)
      • Weight: 750 g
      • Engine: 2-stroke

      When to change the insert?

      • Switch to a different fuel (98 or race fuel with a higher octane rating).
      • Engine knocking (pinking) or running hot: compression too high for the fuel.
      • You want more torque on tight or sandy terrain.

      Change the insert when you change fuel or type of riding, or if the engine pinks. The insert's three dimensions (volume, piston height, squish) must match your engine.

      Fitting tips

      1. The insert is changed with the cylinder head removed.
      2. Check that the actual height of your piston at top dead centre matches the figure given for the insert.
      3. Replace the VHM head O-rings every time you take it apart.
      4. Check the squish with solder wire before riding.
      5. Tighten the head to the recommended torque, in a criss-cross pattern and in several stages, then fit a new spark plug.

      Why ATHENA?

      Athena, an Italian company founded in 1973 near Vicenza, designs gaskets, pistons and cylinder kits for motorcycles. An OEM supplier to KTM, Ducati, Fantic, Piaggio and Triumph and a partner of the MXGP world championship, it develops its parts on the test bench and on the track with racing teams.

      Spare parts and items to plan

      Frequently asked questions

      Will it fit my original cylinder head?
      No: VHM inserts only fit VHM cylinder heads.

      Which version should I choose?
      Choose according to your engine and fuel.

      Compatibility

      Check the exact model and year of your bike in the list below before ordering.

      Fits:
      FANTIC XE 125 2026
      FANTIC XE 125 2025
      FANTIC XE 125 2024
      FANTIC XE 125 2023
      FANTIC XX 125 2026
      FANTIC XX 125 2025
      FANTIC XX 125 2024
      FANTIC XX 125 2023
      FANTIC XX 125 2022
      YAMAHA YZ 125 2027
      YAMAHA YZ 125 2026
      YAMAHA YZ 125 2025
      YAMAHA YZ 125 2024
      YAMAHA YZ 125 2023
      YAMAHA YZ 125 2022

      ATHENA
      P400485200002
      5 Items

      Specific References

      Click on your bike to see all compatible parts.

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      ATHENA Cylinder Head Insert ref. P400485200002 for FANTIC XE 125, XX 125 and YAMAHA YZ 125 2022-2027
      ATHENA Cylinder Head Insert ref. P400485200002 for FANTIC XE 125, XX 125 and YAMAHA YZ 125 2022-2027
      ATHENA Cylinder Head Insert ref. P400485200002 for YAMAHA YZ 125 and FANTIC XX 125 2022-2027
      ATHENA Cylinder Head Insert ref. P400485200002 for FANTIC XE 125, XX 125 and YAMAHA YZ 125 2022-2027
      €161.90
      Tax Included