Product Description
The 521088/B Grommet is a high-quality OEM rubber bush used primarily as a mounting point for side panels and utility boxes. Over time, original rubber grommets can become hard, cracked, or lost during service, leading to loose panels, annoying metallic rattles, and potential damage to the panel’s mounting tabs.
This genuine replacement is made from a specific high-density rubber compound that offers the perfect balance of flexibility and grip. It is designed to seat firmly into the frame or bracket holes, providing a cushioned receptacle for the side panel’s pins. Using the correct OEM part ensures that the “groove” profile matches your frame’s thickness exactly, preventing the grommet from popping out when you remove or install the side covers.
Key Features:
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Vibration Isolation: Dampens engine and road vibrations to prevent “panel buzz” and rattling noises.
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Exact OEM Fit: 100% original Royal Enfield part (PN: 521088/B) ensures the correct inner and outer diameters.
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Protective Mounting: Prevents direct metal-on-metal contact, protecting your paint and plastic mounting tabs from wear.
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Durable Rubber Material: Resists oil, fuel, and UV exposure to maintain its elasticity for years.
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Easy Installation: Can be pressed into place by hand (a small amount of soapy water can help if the fit is tight).
Technical Specifications:
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Part Number: 521088/B
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Material: Specialized Industrial Rubber
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Color: Black
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Quantity: 1 Unit (Multiple may be required for a full set)
Vehicle Compatibility:
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Royal Enfield Classic 350/ 500 (Euro 3 / BS3 Models)
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Royal Enfield Continental GT 535 (Euro 3 & Euro 4 Models)
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Royal Enfield Thunderbird 350 / 500 (Select older “T1” variants)
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Note: This specific part is typically found in the Utility Box assembly for the Classic 500 and the Side Panel/Frame Fittings for the GT 535. It is not the standard grommet for newer J-Series models like the Meteor or Classic Reborn.










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