Genuine Royal Enfield Valve Stem Seal Kit (Part No: KLF00001/B) – OEM Valve Seals for 350cc & 500cc UCE Engines

Product Description

Prevent engine oil consumption and excessive exhaust smoke with the Genuine Royal Enfield Valve Stem Seal Kit. This essential OEM component (Part No: KLF00001/B) is designed to fit the valve guides of Royal Enfield Unit Construction Engines (UCE), including both 350cc and 500cc variants.

While often associated with “Old Model” UCE bikes (pre-J-Series), these seals are a critical update for maintaining the top-end health of your engine. The kit typically includes two valve stem seals (one for the inlet and one for the exhaust valve). These seals are manufactured from high-temperature resistant Viton or specialized rubber compounds to ensure a tight seal around the valve stems, preventing oil from leaking into the combustion chamber. Replacing these seals during a top-end overhaul or if your bike is “burning oil” can significantly improve fuel efficiency and reduce carbon buildup on the piston crown.

Key Features:

• OEM Sealing Performance: 100% Genuine Royal Enfield part, ensuring the correct tension and fitment on factory valve guides.

• High Heat Resistance: Specifically formulated to survive the extreme temperatures found at the cylinder head without hardening or cracking.

• Oil Control: Primary defense against “blue smoke” on startup and high oil consumption.

• Universal UCE Fit: Compatible across the entire range of single-cylinder UCE 350cc and 500cc air-cooled engines.

• Standard Dimensions: Designed to suit standard valve stems (approx. 7mm to 8.7mm depending on specific UCE head variant).

Product Specifications:

• Brand: Royal Enfield Genuine Parts

• Part Number: KLF00001/B (Supersedes 500322/A in some kits)

• Material: High-Temperature Resistant Nitrile / Viton Rubber

• Color: Green / Brown / Black (Color-coded for specific heat ratings)

• Compatibility:

  • ✅ Royal Enfield Classic 350 / 500 (UCE)

  • ✅ Royal Enfield Standard 350 / 500 (UCE)

  • ✅ Royal Enfield Thunderbird 350 / 500 (UCE)

  • ✅ Royal Enfield Electra 350 (UCE)

  • ❌ Note: Not for older Cast Iron (CI) models (which often do not use seals) or the newer J-Series engines.