Athena Top End Gasket Kit for Yamaha (P400485600254)

The Athena P400485600254 Top End Gasket Kit is designed for professional, semi-professional, and amateur riders who refresh their engine before competition or during the riding season. This complete kit supports reliable top-end service and is engineered to help maintain proper sealing and engine performance during demanding use.
The kit includes a premium MLSS head gasket along with two or more high-quality base gaskets in different thicknesses. These gasket options allow riders and technicians to optimize the engine’s compression ratio according to the intended fuel and performance setup. Use the appropriate base gasket to retain stock compression for standard pump gas or increase compression for race fuel applications.
Athena manufactures this top-end gasket kit for dependable fitment and consistent sealing when servicing compatible Yamaha engines. The P400485600254 kit is a practical choice for engine rebuilds, pre-race maintenance, and midseason refreshes where gasket quality and compression control are important.
This kit does not include valve stem seals, rubber parts, shims, or additional fiber gaskets. Verify application and engine compatibility before installation, and follow the manufacturer’s service procedures for proper gasket placement and torque specifications.

Features:

• Application: Designed for professional, semi-professional, and amateur riders performing top-end engine service

• Head Gasket: Includes a premium MLSS head gasket for reliable sealing

• Base Gaskets: Includes two or more base gaskets with different thicknesses

• Compression Adjustment: Helps optimize compression for standard pump gas or race fuel

• Service Use: Suitable for pre-race preparation and midseason engine refreshes

• Brand: Athena

• Part Number: P400485600254

• Compatibility: Designed for compatible Yamaha engine applications

• Contents: Does not include valve stem seals, rubber parts, shims, or additional fiber gaskets

Ships from Parts Unlimited.