The Royal Enfield Genuine Right-Hand Crankshaft Bearing (Part No. RLB00021/B) is a critical internal engine safety hardware component engineered explicitly for Royal Enfield’s modern J-Series 350cc SOHC engine platform. Positioned securely inside the right-side crankcase housing journal, this heavy-duty ball bearing supports the rotating weight of the crankshaft assembly, ensuring ultra-smooth rotational delivery to the primary drive and clutch layout.
As verified by the official packaging barcode label in image_1981d0.png and shown in the product profile in image_198207.png, this bearing is built to micro-tolerance clearances designed to endure constant high-RPM mechanical loads. Utilizing the authentic RLB00021/B right-hand main bearing ensures exact outer-ring friction fitment and structural precision. This prevents radial shaft play, devastating engine vibrations, or lower-end bearing failure common with standard or mismatched commercial-grade replacement bearings.
Key Features:
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100% Genuine J-Series Bottom-End Component: Authentic factory-original internal engine replacement hardware as verified by the OEM tracking label in image_1981d0.png.
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Micro-Ground Steel Construction: Forged from premium high-carbon chromium steel alloy, engineered to handle intense radial loads and high-speed operation.
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Optimized Internal Clearance: Designed to allow structural expansion during high thermal cycles, maintaining a fluid, low-friction operation within the crankcase.
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Suppresses Crankcase Vibrations: Eliminates shaft deflection, restoring showroom-smooth mechanical refinement and protecting adjacent primary drive gears.
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Direct Fitment Blueprint: Machined to strict millimeter factory specifications for a secure press-fit installation directly into the right-hand engine casing.
Technical Specifications:
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Brand: Royal Enfield Genuine
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Part Number: RLB00021/B
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Component: Bearing, Crank Shaft Right-Hand (RH Main Bearing)
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Engine Platform: Next-Gen J-Series 350cc SOHC
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Material: High-Strength Hardened Chrome Steel Alloy
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Country of Origin: India
Motorcycle Compatibility
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Royal Enfield Classic 350 (Next-Generation J-Series / Reborn Models, 2021-Present)
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Royal Enfield Meteor 350 (All J-Series Variants – Fireball, Stellar, Supernova)
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Royal Enfield Hunter 350 (All Variants Retro / Metro)
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Royal Enfield Bullet 350 (New Generation J-Series Engines, 2023-Present)










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