Product Description
The KIT BSOR TB09 500cc is manufactured by Rolon (L.G. Balakrishnan & Bros Ltd), the industry leader in motorcycle transmission components. This kit is a direct upgrade over standard chains, featuring a Solid Bush O-Ring Chain that uses synthetic rubber seals to lock in factory-applied lubricant. This drastically reduces internal friction and prevents the ingress of water and grit, which is critical for long-distance touring and highway cruising.
The rear sprocket features the specialized “Flower Type” window mounting pattern required for the rear-disc hub, ensuring a perfect fit without the need for spacers or modifications. Both sprockets are made from high-carbon steel and undergo induction hardening to prevent “hooking” or tooth breakage under the heavy engine pulses of the 500cc long-stroke motor.
Key Features:
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500cc Torque Optimized: Specifically geared with an 18-tooth front sprocket to leverage the higher power band of the 500cc engine compared to the 350cc variants.
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O-Ring Sealed Protection: Retains internal grease to ensure smooth, quiet operation and up to 40% longer lifethan non-sealed chains.
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Rear-Disc Hub Compatibility: Features the exact bolt-hole geometry (Flower Window) for the Thunderbird 500 and late-model Classic 500 rear disc hubs.
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NVH Reduction: Precision-machined teeth profiles significantly reduce noise, vibration, and harshness (NVH) during high-speed riding.
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Rust Prevention: Zinc-coated rear sprocket provides a durable barrier against corrosion, maintaining aesthetics and structural integrity.
Technical Specifications:
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Kit Part Number: KIT BSOR TB09 500CC (RE Ref: 888439)
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Chain Specification: 102 Links (Solid Bush / O-Ring)
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Front Sprocket (Z): 18 Teeth (Mounting: 2 Tap on PCD + Involute Spline)
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Rear Sprocket (Z): 38 Teeth (Mounting: Flower Type Window for Disc)
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Brand: Rolon Premium
Vehicle Compatibility:
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Royal Enfield Thunderbird 500 / 500X (Dual Disc Models)
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Royal Enfield Classic 500 Stealth Black / Gunmetal Grey (Dual Disc Models)
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Royal Enfield Classic 500 Pegasus / Tribute Black
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Note: This kit is specifically for Dual Disc 500cc models. For the 350cc rear-disc models, use the BSOR TB09 350(16T front); for drum brake 500cc models, use the BSOR CL09 500 (Bore type rear).












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