Athena Cylinder Head O-ring FKM 70sh KTM SX 50 02-08 & SX 65 01-08 / KX 250F 20-23

The Athena Cylinder Head O-ring FKM 70 Shore A is a high-quality sealing component for top-end rebuilds of popular KTM and Kawasaki models. Built for long-lasting reliability, this O-ring provides a tight seal under high temperatures and oil/coolant exposure.

• Material: FKM (fluorocarbon elastomer) seal for excellent heat and chemical resistance
• Hardness: 70 Shore A, designed for consistent sealing under demanding operating conditions
• Application: Cylinder head O-ring intended for top-end rebuilds for KTM SX 50 (2002–2008), KTM SX 65 (2001–2008) and Kawasaki KX 250F (2020–2023)
• Condition: New – Athena replacement part, ready for immediate use
• Part Number: JU-M751802212094 for easy identification and purchase

This O-ring is a necessary component during an engine rebuild, as a reliable seal is essential for maintaining compression and preventing leaks. Thanks to its specialized material and precise sizing, it fits tightly on the cylinder heads of the listed models, letting you get back riding with confidence more quickly. Athena is renowned for durable, high-performance parts suited for heavy-duty engine work and regular maintenance — perfect for both hobbyist and professional users seeking a reliable replacement during top-end rebuilds.