TOP END GASKET KIT 27 YAMAHA YZ F 250 ATHENA P400485600275 NO VALVE COVER GASKET

The Athena Top End Gasket Kit, code P400485600275, provides the seals needed when servicing the cylinder assembly of the specified Yamaha YZ F. It is designed to meet OEM engine specifications and withstand the mechanical and thermal stresses of off-road riding.

Features

• Developed for off-road conditions involving mud, sand, dust and extreme heat.


• Race-tested with professional riders, with development informed by Athena’s work with race engineers and teams in MXGP, AMA Supercross, Pro Motocross and EnduroGP.


• Developed in collaboration with European and Japanese off-road manufacturers for compatibility with OEM specifications.


• Designed using 2D and 3D modelling, Fuji Paper and Tin Testing, and FEM simulations; validated on static and dynamic test benches.


• Multi-layer embossing is optimised for uniform compression and sealing during prolonged use.

Kit Contents

• Essential cylinder-unit seals, including head, base and exhaust gaskets, O-rings and washers.


• Valve cover gasket is not included.

Cross-Reference OEM Part Numbers

• Athena: P400485600275

Vehicle Fitments

• Yamaha YZ F, 250 cc, 2027