COMETIC Top End Gasket Kit for Yamaha C7399 – Fits Yamaha High-Performance 4-Stroke Engines

Top End Gasket Kit - Yamaha

The COMETIC C7399 Top End Gasket Kit is engineered to provide reliable sealing and optimal performance for Yamaha 4-stroke engines, including high-output naturally aspirated and boosted models. This comprehensive kit includes the essential base gasket, head gasket, cylinder O-rings, and other specific seals necessary for a complete top-end rebuild. Designed with durability and precision in mind, the MLS head gaskets feature a multi-layered steel construction with embossed outer layers coated in Viton rubber, ensuring an even torque load across the sealing surface. This design minimizes bore distortion and enhances piston ring sealing, resulting in increased power output and engine efficiency.
The EST (Extreme Sealing Technology) gaskets utilize embossed stainless steel components covered with proprietary rubber materials to withstand high cylinder pressures and temperatures typical of high-horsepower engines. The head gasket material is engineered to dissipate heat evenly away from the combustion ring, reducing hot spots that can lead to gasket failure and engine damage. This gasket kit is suitable for Yamaha engines used in demanding applications, providing a dependable seal under extreme conditions.
Compatibility for this gasket kit includes Yamaha models such as the YZ250F, YZ450F, WR250F, WR450F, and other high-performance Yamaha 4-stroke motorcycles. Whether you're restoring a vintage Yamaha or upgrading your current machine, this kit ensures a proper fit and long-lasting performance. Made in the USA, the COMETIC C7399 gasket kit offers professional-grade quality designed to meet the rigorous standards of motorcycle enthusiasts and professional mechanics alike.

Features:

• Includes base gasket, head gasket, cylinder O-rings, and other top-end seals

• Multi-layered steel (MLS) head gaskets with embossed and Viton rubber-coated outer layers for durability

• Extreme Sealing Technology (EST) for high-cylinder-pressure resistance

• Designed to dissipate heat evenly to prevent hot spots and gasket failure

• Compatible with Yamaha YZ250F, YZ450F, WR250F, WR450F, and other high-performance Yamaha 4-stroke engines