Product Description
The 570213 Oil Seal is a high-performance component engineered to seal the gap between the gearbox mainshaft and the crankcase. It is famously known as the “Sprocket Seal” because it sits directly behind the front drive sprocket.
This is a Double Lip (DO) seal manufactured by Aeroquip. The primary internal lip is spring-loaded to keep transmission oil inside the gearbox, while the secondary external “dust lip” prevents road grit, mud, and water from entering the gearbox assembly. Made from premium Nitrile Butadiene Rubber (NBR 70), it is designed to operate reliably in temperatures ranging from -30°C to 120°C.
Key Features:
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Double Lip Protection: Dual-barrier design keeps oil in and contaminants out.
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Aeroquip SU Quality: Uses high-grade rubber compounds that resist the chemical additives in gear oils.
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Precision Fit: Designed with exact tolerances to prevent shaft scoring while maintaining a tight seal.
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Heat & Pressure Durable: Specifically vulcanized to handle the high rotational friction of the UCE output shaft.
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OEM Standard: 100% original Royal Enfield part, ensuring the correct spring tension for long-term reliability.
Technical Specifications:
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Part Number: 570213 (Also replaces 570213/A)
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Dimensions: 55mm (Outer Diameter) x 42mm (Inner Diameter) x 7mm (Width)
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Material: NBR 70 (Nitrile Rubber)
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Type: Double Lip (DO)
Vehicle Compatibility:
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Royal Enfield Classic 350 / 500 (UCE BS3, BS4, BS6)
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Royal Enfield Bullet 350 / 500 (UCE Variants)
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Royal Enfield Thunderbird 350 / 500 / 350X / 500X
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Royal Enfield Continental GT 535
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Royal Enfield Electra 350 (UCE)
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Note: This seal is specific to the UCE gearbox. It is not used in the newer J-Series (Reborn/Meteor) or 650 Twin engines.











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