Product Description
The 2660300101 is a heavy-duty, twin-piston floating caliper designed to provide the strong “bite” and consistent stopping power required for heavy single-cylinder motorcycles. As an original equipment part, it ensures perfect alignment with the front fork sliders and the 280mm brake rotor.
This assembly is a common replacement for calipers that have developed “piston sticking” issues, fluid leaks around the seals, or uneven pad wear due to warped guide pins. The caliper body is made from high-strength aluminum alloy for superior heat dissipation, finished in a durable Matte Black powder coating to resist corrosion from brake fluid and road salt.
Key Features:
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Twin-Piston Design: Provides uniform pressure across the brake pads for better modulation and reduced stopping distances.
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OE Vendor Reliability: Manufactured by Endurance, the primary brake system supplier for Royal Enfield, ensuring factory-level safety and performance.
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Plug-and-Play Fitment: Direct replacement for RE Part No. 147649/A, fitting perfectly into the factory mounting points without modification.
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Pre-installed Components: Typically includes the caliper housing, dual pistons, high-pressure seals, and the sliding guide pin assembly.
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Standard Banjo Thread: Uses the standard 10mm banjo bolt interface for a secure leak-free connection to the brake hose.
Technical Specifications:
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Part Number: 2660300101 (also referenced as B20303500O)
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Brand: Endurance Technologies Limited
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Application: Front Disc Brake (Non-ABS / Single Channel ABS)
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Configuration: Twin-Piston Floating Caliper
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Finish: Matte Black
Vehicle Compatibility:
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Royal Enfield Classic 350 / 500 (UCE Models, 2010–2021)
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Royal Enfield Bullet 350 ES / 500 (Electric Start UCE Models)
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Royal Enfield Electra 350 (UCE Models)
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Royal Enfield Thunderbird 350 / 500 (BS3 & BS4 Models)
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Note: Specifically for the UCE platform. Not compatible with the newer J-Series (Meteor/Reborn) or dual-channel ABS models that require the larger Brembo/ByBre calipers.











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