Cometic Top End Gasket Kit 97mm Bore for Yamaha WR450F YZ450F

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