ATHENA R4856-089 Race Gasket Kit for Yamaha 80/85 YZ 1993–2018

Fine-tune your engine build with Athena's Race Gasket Kit. Designed for racers and performance enthusiasts, this premium gasket kit gives you the flexibility to precisely adjust cylinder height for optimized squish clearance, compression ratio, and valve timing. Manufactured using advanced sealing materials and backed by over 40 years of Athena engineering, these gaskets deliver exceptional durability, heat resistance, and leak-free performance under the most demanding racing conditions.

• Race-spec gasket kit designed for precision engine tuning and performance builds
• Includes multiple cylinder base gasket thicknesses for accurate squish and compression adjustment
• Premium gasket materials resist heat, oil, fuel, and extreme cylinder pressures
• Precision-manufactured to meet or exceed OEM sealing specifications
• Advanced sealing treatments help prevent leaks in critical engine areas
• No additional silicone sealants required for proper installation

Includes:

• Cylinder Head Gasket
• OEM Thickness Cylinder Base Gasket
• 0.10mm Thinner Cylinder Base Gasket

• Designed for high-performance 2-stroke  motocross engines
• Allows adjustment of squish clearance, compression ratio, and valve timing
• Manufactured using premium gasket materials, including Athena's proprietary Motorgasket® technology where applicable
• Engineered for maximum sealing under extreme mechanical and thermal loads

The ATHENA R4856-089 Race Gasket Kit is designed for Yamaha 80/85 YZ models from 1993 through 2018. It provides a race-oriented gasket kit solution for applicable engine service and rebuild work.

Built for use with the specified Yamaha YZ 80/85 application range, this kit supports organized gasket replacement during maintenance or repair. Confirm the model and year before installation to ensure the part is appropriate for your application.

The kit is supplied as one unit and carries ATHENA part number R4856-089 for straightforward identification when selecting replacement components.

Features:

• Application: Yamaha 80/85 YZ models from 1993–2018
• Product type: Race gasket kit
• Brand: ATHENA
• Part number: R4856-089
• Unit of measure: Each