Product Description
The 500322/A Valve Stem Seal Kit is an authentic factory-original (OEM) replacement designed for the cylinder head assembly of the Unit Construction Engine (UCE). These seals sit at the top of the valve guides and act as a precise “wiper,” allowing just enough oil to lubricate the moving valve stem while preventing excess oil from leaking into the combustion chamber.
If your motorcycle is emitting blue smoke from the exhaust during cold starts or sudden deceleration, it is a classic sign that the valve stem seals have hardened or cracked. Replacing them with this genuine kit—made from high-temperature resistant Viton or specialized rubber—restores the engine’s internal seal, improves fuel efficiency, and prevents spark plug fouling.
Key Features:
-
Genuine OEM Precision: 100% original Royal Enfield spare (PN: 500322/A), ensuring the exact inner diameter and tension required for UCE valve stems.
-
High Thermal Resistance: Manufactured to withstand the extreme temperatures of the cylinder head without losing elasticity.
-
Controlled Lubrication: Engineered to provide a metered oil film to the valve stem, reducing friction and guide wear.
-
Prevents Carbon Buildup: Stops oil seepage into the intake and exhaust ports, keeping your valves clean and seated properly.
-
Direct Fitment: Standardized for the 350cc and 500cc UCE valve guide geometry.
Technical Specifications:
-
Part Number: 500322/A
-
Component Type: Valve Stem Seal Kit
-
Material: High-Grade Fluorinated Elastomer (Viton Type)
-
Color: Green / Brown (Varies by batch)
-
Quantity: 1 Kit (Contains 2 Seals)
Vehicle Compatibility:
-
Royal Enfield Classic 350 / 500 (All UCE Models)
-
Royal Enfield Bullet 350 / 500 (UCE Models)
-
Royal Enfield Thunderbird 350 / 500 / 350X / 500X
-
Royal Enfield Continental GT 535
-
Royal Enfield Bullet Trials 350 / 500
-
Note: Specifically for the UCE platform. Not for the older Cast Iron engines or the new J-Series/650 Twins.










Reviews
There are no reviews yet