Athena Complete Gasket Kit for KTM 250-300 SX, XC, EXC - Part P400270900099

Athena’s Complete Engine Gasket Kits for offroad applications are engineered to meet the toughest demands of motocross, enduro, and ATV/UTV engines. Designed for full engine overhauls, this kit provides every seal and gasket needed to restore performance and reliability under the harshest conditions.

Every seal you need, in one complete kit

This Athena Engine Kit includes all essential gaskets and seals: head, base, crankcase, exhaust, valve cover, engine oil seals, valve stem seals, O-rings, and washers. Nothing is left out—each component is selected to ensure long-lasting performance in high-stress environments.

Race-developed technology for offroad performance

Athena supports top teams in MXGP, AMA Supercross, Pro Motocross, and EnduroGP. Gaskets are tested on track and refined through direct collaboration between Athena’s R&D department and race engineers. The same technology used in competition is made available to all riders.

Trusted by OEMs worldwide

Athena has long-standing partnerships with leading European and Japanese offroad manufacturers. This ensures perfect OEM compatibility, precise fitment, and consistent performance across a wide range of offroad engines.

Advanced design and total quality control

Each gasket is developed using 2D/3D modeling, Fuji Paper and Tin Testing, FEM simulations, and validated on static and dynamic test benches. Multi-layer embossing ensures uniform compression and optimal sealing. Dimensional accuracy is verified using profilometers and Virtek® systems.

All gaskets and seals included for complete engine rebuilds

Perfect fit with OEM offroad engine specifications

Built to withstand extreme and prolonged conditions

Developed with factory teams in MXGP and AMA

The Athena Complete Gasket Kit (Part P400270900099) is designed specifically for KTM 250-300 SX, XC, and EXC models, offering a comprehensive solution for engine rebuilds and repairs. This gasket kit includes all necessary gaskets to ensure a perfect seal, preventing leaks and maintaining optimal engine performance. Crafted with precision, Athena’s gaskets are manufactured to meet or exceed OEM standards, providing durability and reliable sealing under demanding conditions.
The kit features high-quality materials that resist heat, oil, and other engine fluids, ensuring long-lasting performance. Installation of this gasket kit helps restore engine integrity, reduce the risk of leaks, and improve overall engine efficiency. Whether you're a professional mechanic or a dedicated enthusiast, this complete gasket set simplifies maintenance and enhances the longevity of your KTM motorcycle.
The Athena gasket kit is an essential component for engine rebuilds, top-end repairs, or routine maintenance, offering peace of mind with a trusted brand known for precision and durability. Designed to fit the specified KTM models perfectly, this kit is an ideal choice for those seeking a reliable and comprehensive gasket solution for their motorcycle.

Features:

• Designed specifically for KTM 250-300 SX, XC, and EXC models

• Includes all necessary gaskets for complete engine sealing

• Manufactured with high-quality, heat-resistant materials

• Ensures durable, long-lasting performance

• Facilitates easier engine rebuilds and repairs