Crankcase Gasket and Oil Seal Kit for Yamaha YZ450F WR450R YFZ450R

Product Overview

Engineered for the high-revving demands of the Yamaha 450cc platform, this premium crankcase gasket and oil seal kit provides a military-grade seal for your engine. Built to withstand the punishing vibrations of motocross and desert racing, this kit uses advanced fiber-reinforced materials to stop oil leaks and prevent dirt ingestion, ensuring your engine maintains peak compression and lubrication.

Product Compatibility

Important: This kit is designed for the high-performance 450 series. Does NOT fit WR450F models.

Vehicle Type	Model	Year Range	Engine Type
Motocross	Yamaha YZ450F	2003–Current	449cc Liquid-Cooled
Sport ATV	Yamaha YFZ450R	2009–Current	449cc Fuel-Injected
Off-Road	Yamaha WR450R	(Verify Year)	449cc Single Cylinder
Sport ATV	Yamaha YFZ450X	2010–2011	449cc Single Cylinder

Specifications

Feature	Details
Gasket Material	Graphite-Embedded High-Temp Fiber
Oil Seal Material	Fiber-Reinforced Nitrile Rubber (NBR)
Primary OEM Ref	11395-MEB-670 (Cross-Compatible Type)
Environment	Extreme Off-Road / Racing Conditions
Package Includes	Crankcase Gasket & Primary Oil Seal Set

Key Features

• Graphite-Embedded Technology: The gaskets feature embedded graphite for superior heat dissipation and a non-stick surface, making future removals cleaner and easier.
• Fiber-Reinforced Seals: High-strength rubber seals are reinforced with internal fibers to resist tearing and wear caused by constant off-road vibrations and high RPMs.
• Vibration Dampening: Specifically designed for the Yamaha 450 platform to absorb engine harmonics, preventing gasket "creeping" and ensuring a permanent seal.
• Extreme Chemical Resistance: Resistant to high-detergent synthetic oils and racing fuels, preventing seal swelling or degradation over time.
• Precision Die-Cut Alignment: Laser-cut for a 100% accurate fit with Yamaha engine cases, ensuring all oil galleries and bolt holes align perfectly without modification.