The Genuine Royal Enfield 1st Piston Ring (Part Number: 1570400/B) is the factory-original top compression ring designed for the modern J-Series 349cc engine. As the ring closest to the combustion chamber, it is engineered to withstand the highest temperatures and pressures within the cylinder.
Key Features:
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OEM Authenticity: A 100% genuine Royal Enfield part, identical to the factory-installed component for guaranteed performance and fitment.
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Superior Compression Seal: Specifically designed to create a tight seal between the piston and cylinder wall, preventing combustion gases from leaking into the crankcase (blow-by).
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Advanced Heat Transfer: Efficiently transfers heat from the piston crown to the cylinder wall, protecting the engine from overheating and maintaining structural integrity.
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OEM Metallurgy: Constructed from high-grade materials (often cast iron with specific coatings) to ensure durability, proper tension, and resistance to ring flutter at high RPMs.
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Performance Restoration: Ideal for engine overhauls to restore original power, throttle response, and fuel efficiency.
Specifications:
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Compatibility: Royal Enfield Meteor 350, Classic 350 Reborn, Hunter 350, and New Bullet 350 (J-Series models).
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Size: Standard (STD) for stock bore.
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Position: 1st / Top Compression Ring.
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Part Number: 1570400/B (also compatible with 1570400/A).
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