EPI Wet Clutch Cover Gasket WE590005
Updated June 15, 2026
The EPI Wet Clutch Cover Gasket (WE590005) is a replacement gasket designed for the wet clutch portion of CVT clutch systems on select Yamaha ATVs and side-by-sides. It provides a reliable seal between the clutch cover and transmission housing, preventing oil leaks and ensuring proper clutch operation. This gasket is commonly used when servicing the wet clutch or installing a performance clutch kit.
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Function and Application
This gasket seals the wet clutch cover on Yamaha CVT-equipped vehicles. It replaces the original equipment foam or paper gasket and is required whenever the wet clutch cover is removed, such as during clutch inspection, replacement, or upgrade. The gasket accommodates the oil-filled wet clutch environment and maintains consistent sealing under heat and pressure.
Vehicle Compatibility
The EPI WE590005 fits Yamaha Grizzly 660 models from 2002 to 2008 (including special editions like Ducks Unlimited and Outdoorsman) and Yamaha Rhino 660 models from 2004 to 2007. It is a direct replacement for OEM part numbers 5KM-15463-00-00 and 399159, and is also compatible with performance clutch kits from EBC and Hinson Racing.
Installation Notes
During installation, ensure the mating surfaces on the clutch cover and transmission housing are clean and free of old gasket material. Apply a light coat of oil to the gasket if recommended by the manufacturer. Tighten the cover bolts in a crisscross pattern to the specified torque (torque value not provided). Replacing the gasket each time the cover is removed is recommended to prevent leaks.
