Athena Top End Gasket Kit for Yamaha (P400485600199)

The Athena P400485600199 Top End Gasket Kit is designed for professional, semi-professional, and amateur riders who refresh their Yamaha engine before a race or during the riding season. It provides the essential top-end sealing components needed for engine service while supporting reliable performance and consistent compression.
The kit includes a premium MLSS head gasket along with two or more high-quality base gaskets in different thicknesses. This selection allows riders and engine builders to fine-tune the compression ratio for their setup, whether retaining stock compression for standard pump gas or increasing compression for use with race fuel. Gasket thickness options provide added flexibility during engine rebuilding and performance preparation.
Athena manufactures the P400485600199 kit to meet the demands of serious engine maintenance and race preparation. Its application-specific design helps simplify top-end service while delivering dependable sealing between engine components. Always verify fitment for your specific Yamaha model and engine configuration before installation, and follow the manufacturer’s recommended torque sequence and service procedures.
This top-end gasket kit does not include valve stem seals, rubber components, shims, or additional fiber gaskets. These parts must be sourced separately when required for the engine rebuild. The Athena P400485600199 is a practical choice for riders seeking quality replacement gaskets and compression tuning flexibility in one service kit.

Features:

• Application: Top-end gasket kit designed for Yamaha engine service and race preparation

• Gasket Contents: Includes a premium MLSS head gasket and two or more base gaskets with different thicknesses

• Compression Tuning: Supports stock compression for standard gas or increased compression for race gas applications

• Intended Use: Suitable for professional, semi-professional, and amateur riders

• Service Scope: Designed for pre-race engine refreshes and midseason top-end maintenance

• Exclusions: Does not include valve stem seals, rubber parts, shims, or other fiber gaskets

Ships from Parts Unlimited.