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From clutch springs to valve springs since 1999 we have been improving the performance and durability of all kinds of OEM springs
higher performance
Viscosity SUS @ 100°F 260
KTM 250EXC-F 2017-2023
KTM 85SX / TC85 2025-2026 Husqvarna/ GasGas MC85 VHM Cylinder Head + Insert Kit AA33222 KX 250X From clutch springs to valveMade in the Netherlands The world famous golden VHM head with exchangeable combustion chamber is specially developed for optimal power output during the whole race and has an improved water duct. It's manufactured from a high quality alloy and O rings are used for the sealing. Use VHM standard insert: AE32361 E (for OEM piston) AE32361 026 (for 12 VHM piston APKT08521707) Use the insert chart as a general guideline to select the insert depending on