Cylinder Head O-Ring 89x2 for KTM/Husqvarna 125/150 2016-2026 - 0770890200

This genuine OEM cylinder head O-ring (89x2mm) is a critical sealing component for high-performance 2-stroke engines. Made from durable NBR 70 Shore rubber, it provides a reliable, heat-resistant seal between the cylinder and the head insert to maintain optimal compression and cooling.

Compatible with: KTM 125 SX (2016-2026), 125 XC (2021-2025), 125 XC-W (2017-2026), 150 EXC (2020-2025), 150 SX (2016-2025), 150 XC-W (2017-2026); Husqvarna TC 125 (2016-2026), TC 150 (2025), TE 125 (2025-2026), TE 150 (2017-2026), TX 125 (2017-2019); GasGas EC 125 (2025), MC 125 (2021-2026), and MC 150 (2025). This includes all TPI, Heritage, and US/EU specific variants.

Using original parts guarantees precise dimensions and material compatibility with engine fluids. It is highly recommended to replace this O-ring whenever the cylinder head is removed for maintenance or a top-end rebuild to prevent coolant leaks and compression loss.

Before installation, ensure the mating surfaces are clean and free of debris. A light application of assembly lubricant can help seat the O-ring correctly during the reassembly of the cylinder head.

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