Red Soft Auxiliary Power Valve Spring for KTM/Husqvarna 250/300 - 54837072000

This red auxiliary spring is a genuine OEM part designed for the exhaust control system, commonly known as the power valve, on high-performance 2-stroke engines. It serves as the "soft" tension option, allowing the power valve to open more gradually for a smoother and more linear power delivery.

This part features extensive compatibility with 250cc and 300cc models from 2003 to 2023. It fits KTM 250/300 EXC, SX, XC, and XC-W models, Husqvarna TE, TC, and TX 250/300 series, and GasGas EC, EX, and MC 250 models. It is a direct replacement for the original component in the exhaust valve assembly.

Tuning your engine with this red spring is an effective way to customize the hit of your powerband to suit technical trails or specific rider preferences. As an authentic factory part, it ensures precise spring rates and long-lasting durability under high-heat conditions.

Installation is straightforward and allows for quick adjustments to your motorcycle's power characteristics. It is recommended to inspect the entire exhaust control mechanism for carbon buildup whenever changing or servicing the auxiliary springs.

Check compatibility list below to see if this part fits your motorcycle model.