Cometic 4-Stroke Top End Gasket Kit - 97mm Bore - C3630

The Cometic 97mm bore top end gasket kit is engineered to restore and enhance the performance of your Yamaha WR450F or YZ450F (2018-2020). This comprehensive kit provides all essential components for a complete top end rebuild, ensuring optimal sealing and durability for demanding 4-stroke applications.

Description

The Cometic 97mm bore top end gasket kit is specifically designed for high-performance 4-stroke engines like the Yamaha WR 450 F and YZ 450 F from 2018-2020. This kit features Cometic's renowned Multi-Layer Steel (MLS) head gaskets, which are critical for maintaining an even torque load across the sealing surface. This innovative design significantly reduces bore distortion, leading to a better piston ring seal and ultimately, more power output from your engine.

Crafted to excel in today's highest-output naturally aspirated and boosted machines, these MLS head gaskets incorporate embossed outer layers coated with a durable Viton rubber. This construction ensures exceptional resilience against the high cylinder pressures and temperatures common in modern high-horsepower engines. The kit also includes correct base gaskets, cylinder O-rings, and other top end specific seals, all made with Extreme Sealing Technology (EST) using proprietary rubber-coated embossed stainless steel for reliable, leak-free performance. By efficiently drawing heat away from the combustion ring, these gaskets prevent hot spots and premature failure, providing peace of mind and consistent power.

Features & Highlights

• Optimized Power & Sealing: Features Multi-Layer Steel (MLS) head gaskets that promote even torque distribution, minimizing bore distortion for a superior piston ring seal and increased power output.
• High-Performance 4-Stroke Design: Engineered specifically for high-output 4-stroke engines, with materials built to withstand extreme cylinder pressures and temperatures.
• Advanced Sealing Technology: Utilizes embossed stainless steel gaskets with a Viton rubber coating on head gaskets and a proprietary rubber material on EST base and rocker gaskets, ensuring maximum durability and a leak-free seal.
• Superior Heat Management: Specially designed head gasket material effectively dissipates heat from the combustion ring, eliminating hot spots and significantly extending gasket life.
• Complete Top End Kit: Includes all necessary base and head gaskets, cylinder O-rings, and other specific seals required for a thorough top end overhaul.
• Proudly Made in the USA: Manufactured with precision and quality craftsmanship in the United States, ensuring reliability and performance you can trust.

Technical Specifications

• Type: Top End
• Model: Hi-Performance
• Units: Kit
• Material: MLS (Multi-layer Steel)
• Bore Size: 97.00mm (3.818")
• Thickness: 0.69mm (0.027")
• Engine Type: 4-Stroke
• EAN: 0191070396534