Cometic Top End Gasket Kit for Yamaha 97 mm Engines (C3630)

The Cometic C3630 Top End Gasket Kit includes the correct base gasket, head gasket, cylinder O-rings, and additional top-end-specific O-rings and seals required for a complete top-end removal and reinstallation. Designed for Yamaha 4-stroke engines, this kit supports reliable sealing in high-output naturally aspirated and boosted applications. Its multi-layered steel construction is engineered to handle high horsepower and cylinder pressure while promoting consistent sealing performance.
The MLS head gasket uses embossed outer layers coated with Viton rubber to conform to the sealing surfaces and distribute torque evenly. This design helps reduce bore distortion, improve piston ring sealing, and support stronger engine performance. The gasket material also helps draw heat away from the combustion ring and dissipate it evenly across the gasket surface, reducing hot spots and helping prevent premature gasket failure.
Cometic’s EST (Extreme Sealing Technology) construction includes embossed stainless steel head, base, and rocker gaskets covered with a proprietary rubber material. Each component is developed for dependable sealing during top-end service and demanding riding conditions. The Cometic C3630 kit is made in the USA and provides a practical, application-focused solution for Yamaha engine rebuilds and maintenance.

Features:

• Complete top-end gasket kit with base gasket, head gasket, cylinder O-rings, and required top-end seals

• MLS head gasket construction promotes even torque distribution across the sealing surface

• Helps reduce bore distortion and improve piston ring sealing for enhanced engine performance

• Designed for high-output Yamaha 4-stroke naturally aspirated and boosted engines

• Embossed stainless steel gaskets use proprietary Viton rubber coating for reliable sealing

• Heat-dissipating gasket material helps reduce hot spots and gasket failure

• Cometic EST (Extreme Sealing Technology) construction

• Made in the USA

Ships from Parts Unlimited.