Athena P400485600212 Top-End Gasket Kit 2019-2025 Yamaha YZ250F WR250F

Pro-Level Precision: The Ultimate Engine Refresh for Your Yamaha YZ250F

When it's time to freshen up your engine mid-season or ahead of a big race, you need a seal you can trust. The [Athena P400485600212 Top-End Gasket Kit](http://googleusercontent.com/shopping_content/1_link) is a Racing Performance essential specifically designed for pro, semi-pro, and amateur riders who demand precision. At Moto-House MX, we know that maintaining optimal compression is the key to staying on the podium, and this kit provides the Heavy Duty reliability required for high-stress motocross and off-road environments.

This kit features a top-of-the-line MLSS (Multi-Layer Steel) head gasket and includes two or more premium base gaskets of varying thicknesses. This unique setup gives you the power to optimize engine compression ratios, allowing you to choose between standard pump gas or high-octane race gas. Manufactured in Italy using state-of-the-art computer-controlled facilities, these OEM Replacement gaskets meet or exceed factory specifications to ensure a leak-free, high-performance seal every time you rebuild.

Top Features: Athena P400485600212 Top-End Gasket Kit

• Tunable Compression: Includes multiple base gaskets of different thicknesses to customize your engine's compression ratio.
• Premium MLSS Head Gasket: High-end Multi-Layer Steel construction ensures a superior seal under extreme thermal and mechanical stress.
• Race-Ready Design: Perfect for riders who perform frequent top-end maintenance to keep their engine at peak performance levels.
• Italian Engineering: Developed and manufactured in Italy by Athena, a leading OEM gasket supplier for over 60% of European manufacturers.
• Laser-Cut Precision: Each gasket is laser-cut for a perfect fit, compensating for surface irregularities in the cylinder and head.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2019-2025	Yamaha	YZ250F
2020-2025	Yamaha	YZ250FX
2020-2025	Yamaha	WR250F

Frequently Asked Questions

What is included in this Top-End Gasket Kit?
This kit typically includes the head gasket, base gaskets of multiple thicknesses, and other essential seals for the top end. However, it does NOT include valve stem seals, rubber parts, shims, or other fiber gaskets.

Why are there multiple base gaskets in the kit?
The different thicknesses allow you to adjust the "squish" and compression ratio of your engine. Thinner gaskets can increase compression for race gas, while thicker ones maintain stock parameters for pump gas.

Does this kit meet OEM standards?
Yes, Athena gaskets are engineered to meet or exceed OEM specifications. Athena actually provides the original gaskets for many major European motorcycle brands.

Upgrade Your Bike and keep your Yamaha performing like new with Athena at Moto-House MX.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The best motocross shop in Central Florida.