Exhaust Expansion Chamber O-Ring for KTM/Husqvarna 1999-2026 - 0770440030
Shipping and Availability
Shipping and Availability
We maintain up-to-date stock. If labeled 'In stock Fast Shipping' expect shipment to be sent within 1 working day.
Shipping from Europe typically takes 3-5 working days anywhere in the world.
Note that non-EU countries may have customs duties and added taxes in accordance with local laws.
Description
Description
This genuine OEM exhaust expansion chamber O-ring is a critical component for maintaining the performance of your 2-stroke engine. It provides a high-temperature seal between the exhaust pipe and the cylinder manifold to prevent exhaust leaks and power loss. Manufactured from premium Viton, this 44x3mm ring is designed to resist heat, oil, and fuel degradation.
This versatile seal is compatible with a wide array of models including the KTM 125 SX/EXC, 150 SX/XC-W, 200 EXC, 250 SX/EXC/XC, and 300 EXC/XC-W from 1999 to 2026. It also fits Husqvarna TC/TE/TX 125, 250, and 300 models, as well as GasGas EC, EX, and MC 250/300 series. Whether you ride a classic 1999 250 EXC or a modern 2026 300 TPI/Heritage model, this O-ring ensures a factory-spec fit.
Replacing your exhaust O-rings regularly is vital for preventing "spooge" buildup and ensuring your expansion chamber maintains the correct backpressure. A leaking exhaust can lead to poor throttle response and increased noise. These Viton rings are the standard choice for professional mechanics and factory racing teams due to their superior durability compared to standard rubber.
When installing, ensure the exhaust flange is clean and free of carbon deposits. We recommend replacing both rings at the same time to ensure a perfectly symmetrical seal. A light coating of high-temperature grease can assist in a smooth installation without pinching the rubber during assembly.
Check compatibility list below to see if this part fits your motorcycle model.