Athena Top End Race Gasket Kit (MLSS) R4856-198 - Yamaha YZ65 2018-2025

Product Description

Freshen up your engine before race day or during mid-season maintenance with the Athena top end race gasket kit, engineered specifically for pro, semi-pro, and amateur riders.

Featuring a top-of-the-line multi-layer stainless steel (MLSS) head gasket and multiple premium base gaskets of varying thicknesses, this kit allows you to optimize engine compression ratios to suit your fuel choice.

Top Features: Athena Top End Race Gasket Kit

• Designed specifically for pro, semi-pro, and amateur riders prepping for race day or mid-season rebuilds.
• Includes a top-of-the-line multi-layer stainless steel (MLSS) head gasket for superior sealing under extreme pressure.
• Supplied with two or more premium-quality base gaskets of different thicknesses to fine-tune engine compression ratios.
• Gives riders the flexibility to run standard gas with stock compression or race gas with higher compression.

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: What is included in this top end race gasket kit?
A: The kit includes an MLSS head gasket and multiple base gaskets of varying thicknesses to help you optimize compression.

Q: Can I use this kit to run higher compression race gas?
A: Yes, the included multi-thickness base gaskets give you the flexibility to adjust compression ratios for either standard pump gas or high-octane race fuel.

Expert Pro-Tip: Always measure your squish clearance with solder when swapping base gasket thicknesses during a top-end rebuild to ensure proper piston-to-head clearance before final assembly.

Recommended Pairings:

• Yamaha YZ65 Performance Parts & Upgrades
• Engine Rebuild Kits
• Piston / Top-End Kits

About Moto-House MX

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their machines. We pride ourselves on great customer service, and every item ships FAST - straight to your door.

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