The Royal Enfield Genuine Shaft Valve Rocker Arm (Part No. 1570211/D) is a high-precision internal engine component engineered explicitly for the next-generation J-Series 350cc SOHC engine platform. Serving as the rigid foundational pivot pin inside the cylinder head assembly, this hardened steel shaft anchors the valve rocker arm comp, allowing it to oscillate smoothly and actuate the engine’s intake and exhaust valves with flawless timing.
Manufactured to micro-tolerance factory specifications, this rocker arm shaft is engineered to endure intense, cyclical mechanical loads and extreme thermal variations. Utilizing the authentic 1570211/D spindle pin ensures an exact structural fit with the cylinder head journal housings. This prevents horizontal play, oil pressure drops, or premature metal scoring that frequently causes loud top-end clattering when using low-grade aftermarket replicas.
Key Features:
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100% Genuine J-Series Valvetrain Component: Authentic factory-original cylinder head internal hardware replacement piece.
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Case-Hardened Steel Alloy Build: Specially heat-treated to achieve maximum surface hardness, minimizing friction wear from the rocker arm’s continuous movement.
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Precision-Ground Oil Channels: Features micro-bored internal oil pathways designed to distribute high-pressure lubrication evenly across the rocker arm needle bearings or journals.
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Eliminates Top-End Play: Provides an ultra-snug, vibration-free tolerance fit that keeps the valvetrain tightly aligned and operating silently.
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Direct OEM Fitment: Matches the exact length, diameter, and fluid-routing specifications of the factory-installed J-series engine blueprint.
Technical Specifications:
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Brand: Royal Enfield Genuine
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Part Number: 1570211/D
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Component: Shaft Valve Rocker Arm / Rocker Spindle Pin
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Engine Platform: Next-Gen J-Series 350cc SOHC
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Material: Micro-Ground Case-Hardened High-Tensile 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)
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Royal Enfield Hunter 350 (All Variants)
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Royal Enfield Bullet 350 (New Generation J-Series Engines)










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