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The machined insert that forms the combustion chamber in a two-piece head: it sets the engine’s compression.
Available in several combustion-chamber volumes.
VHM offers this cylinder head insert for HUSQVARNA TC 300, TX 300, KTM SX 300, XC 300 and GAS GAS EX 300, MC 300 2023-2025. On a two-piece head, the insert (the "dome") forms the combustion chamber. Its volume and shape set the compression and the character of the engine.
The benefits:
Signs of detonation, leaking O-rings or the wish to change the compression: the insert can be swapped in minutes, with new O-rings.
Available in several combustion-chamber volumes: a smaller volume raises compression (more punch, quality fuel essential), a larger one lowers it (smoother engine).
Cross-Mania tip: Fit new O-rings, tighten in a cross pattern to the specified torque and, with a higher-compression insert, use high-octane fuel.
Check the exact model and year of your bike in the list below before ordering.
Fits:
GAS GAS EX 300 2025
GAS GAS EX 300 2024
GAS GAS MC 300 2025
HUSQVARNA TC 300 2025
HUSQVARNA TC 300 2024
HUSQVARNA TC 300 2023
HUSQVARNA TX 300 2025
HUSQVARNA TX 300 2024
HUSQVARNA TX 300 2023
KTM SX 300 2025
KTM SX 300 2024
KTM SX 300 2023
KTM XC 300 2025
KTM XC 300 2024
KTM XC 300 2023
Click on your bike to see all compatible parts.
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