Royal Enfield J-Series 350cc Standard Size Piston Ring (3rd / Oil Control) – Part No. 1570402/B

The Genuine Royal Enfield Oil Piston Ring (Part Number: 1570402/B) is the factory-original 3rd ring assembly specifically engineered for the modern J-Series 350cc (349cc) engine. This critical component is responsible for scraping excess oil from the cylinder wall and returning it to the crankcase, ensuring only a thin, controlled film of lubrication remains for the upper rings.

Key Features:

• OEM Authenticity: A 100% genuine Royal Enfield part, identical to the one mounted at the factory during vehicle production.

• Precision Oil Control: Designed to prevent oil from entering the combustion chamber, which significantly reduces blue smoke, spark plug fouling, and excessive oil consumption.

• Engine Protection: Maintains proper lubrication for the cylinder bore while helping to manage engine temperatures and reduce internal friction.

• Standard Size Fitment: Manufactured to strict OEM tolerances for diameter and ring tension, ensuring a perfect fit for stock-bore J-Series engines.

• Durable Construction: Built with high-grade cast iron or steel materials to withstand the rigorous demands of long-distance cruising and daily commuting.

Specifications:

• Compatibility: Royal Enfield Meteor 350, Classic 350 Reborn, Hunter 350, and New Bullet 350 (J-Series BS6/Euro 5 models).

• Size: Standard (STD).

• Position: 3rd Ring (Bottom / Oil Control Ring).

• Part Number: 1570402/B (Alternate: 1570402)