Yellow Auxiliary Exhaust Control Spring for KTM 250/300 1996-2023 - 54637072300

This genuine OEM yellow auxiliary spring is a critical component of the exhaust control system. It is designed to regulate the power valve's opening timing, allowing riders to fine-tune the engine's power delivery and torque curve. As an original equipment manufacturer part, it ensures precise tension and long-lasting performance for your 2-stroke engine.

This spring is compatible with an extensive range of models. It fits KTM 250 and 300 EXC, SX, XC, and XC-W models from 1996 to 2023, including TPI and Six Days editions. It also fits Husqvarna TC 250, TE 250/300, and TX 300 models from 2014 to 2023, as well as GasGas EC, EX, and MC 250/300 models from 2021 to 2023. Additionally, it supports older KTM 380 SX and MXC models from the late 90s and early 2000s.

The yellow spring provides a medium level of resistance, offering a balanced power delivery that is ideal for a variety of terrain and riding styles. Replacing a worn or fatigued spring is essential for maintaining consistent engine response and preventing power loss. Its high-quality steel construction is built to withstand the high temperatures and vibrations of the exhaust assembly.

Installation is straightforward and can significantly change the feel of your motorcycle's powerband. We recommend inspecting the exhaust control system regularly for carbon buildup to ensure the spring and valve operate smoothly. Always refer to your service manual for specific adjustment procedures and maintenance intervals.

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