ATHENA Top End Gasket Kit for Yamaha YZ 125 (2022) - Part Number P400485600271

Athena’s Top End Gasket Kits for offroad applications are engineered to meet the demands of motocross, enduro, and ATV/UTV riders who push their machines through mud, sand, dust, and extreme heat. These kits are the go-to solution for riders and mechanics who demand reliability, precision, and durability in every ride. 

Race-proven technology for real-world performance

Athena supports top teams in the world’s toughest championships—MXGP, AMA Supercross, Pro Motocross, EnduroGP. Gaskets are tested on track by professional riders 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.

Direct collaboration with leading OEM manufacturers

Athena has long-standing partnerships with the most respected European and Japanese offroad brands. This ensures perfect compatibility with OEM specifications, allowing for precise installation and consistent performance over time.

Complete top end sealing solution

Each Offroad Top End Kit includes all essential gaskets for the cylinder unit, such as head, base, exhaust gaskets, O-rings, and washers. Every component is selected to withstand the mechanical and thermal stress typical of offroad riding.

Advanced design and total quality control

Athena gaskets are developed using 2D/3D modeling, Fuji Paper and Tin Testing, FEM simulations, and validated on static and dynamic test benches. Multi-layer embossing is optimized for uniform compression and perfect sealing—even after hours of extreme use.

Gaskets tested in MXGP, AMA, EnduroGP championships

Perfect fit with OEM offroad engine specs

All key top end seals included

Engineered to withstand extreme offroad conditions

The ATHENA Top End Gasket Kit (Part Number P400485600271) is engineered specifically for the Yamaha YZ 125 model from 2022, ensuring a perfect fit and reliable performance. This comprehensive gasket kit includes all necessary components to seal the top end of your motorcycle engine, providing optimal compression and preventing leaks. Crafted with high-quality materials, the ATHENA gasket kit offers durability and resistance to heat and pressure, contributing to the longevity of your engine. Whether you're rebuilding or performing maintenance, this kit simplifies the process, ensuring that all gaskets are compatible and ready to install without the need for additional parts.
Installation is straightforward thanks to precise manufacturing standards, which guarantee a tight seal and proper fitment. The kit's components are designed to withstand the demanding conditions of motocross riding, including high RPMs and exposure to dirt and moisture. Regular use of this gasket kit helps maintain engine efficiency, power output, and overall performance of your Yamaha YZ 125. Trust ATHENA's reputation for quality OEM replacement parts to keep your bike running smoothly and reliably for seasons to come.

Features:

• Designed specifically for Yamaha YZ 125 2022 model

• Includes all necessary gaskets for top-end rebuild

• High-quality materials resist heat and pressure

• Ensures a reliable seal to prevent leaks

• Easy to install with precise fitment standards