Product Description
The KIT BSOR CL09 350cc is manufactured by Rolon (L.G. Balakrishnan & Bros Ltd), the primary chain and sprocket supplier for Royal Enfield’s assembly lines. This kit is designed to handle the heavy torque of the 346cc Twinspark engine while minimizing mechanical noise and power loss.
The standout feature of this kit is the O-Ring Sealed Chain. Each https://www.google.com/search?q=link is sealed with a high-quality synthetic rubber O-ring that locks factory-injected grease inside the chain bushings while keeping out dust, mud, and water. This results in a chain that requires less frequent adjustment and remains quiet even during long-distance touring or off-road excursions. The sprockets are induction-hardened to ensure high wear resistance and are zinc-coated to prevent rust.
Key Features:
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Solid Bush O-Ring Chain: Offers 1.5x to 2x the life of a standard chain by retaining internal lubrication and resisting “stretch.”
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Induction Hardened Teeth: The sprocket teeth undergo specialized heat treatment to withstand the “thump” of the UCE engine without premature chipping or hooking.
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Zinc-Coated Surface: Provides an extra layer of protection against corrosion, maintaining the kit’s structural integrity in wet or humid conditions.
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Quiet Operation: Precision-machined sprockets ensure perfect chain engagement, reducing the “whirring” noise common with worn-out sets.
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Direct Fitment: Designed as a 1:1 replacement for the factory part number 597463, requiring no modifications.
Technical Specifications:
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Kit Part Number: KIT BSOR CL09 350CC (RE Ref: 597463)
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Chain Specification: 100 Links (Solid Bush / O-Ring)
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Front Sprocket (Z): 16 Teeth (Mounting: 2 Tap on PCD + Spline)
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Rear Sprocket (Z): 38 Teeth (Mounting: Bore Type)
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Brand: Rolon Premium
Vehicle Compatibility:
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Royal Enfield Classic 350 (UCE Models, BS3 / BS4 / BS6)
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Royal Enfield Bullet 350 Standard / ES (UCE Models)
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Royal Enfield Electra 350 (UCE Models)
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Note: Specifically for the UCE Single Disc or Rear Drum variants. For the newer Classic 350 Reborn (J-Series), use the updated HPORC389 kit.












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