{"product_id":"royal-enfield-1570402-oil-piston-ring-j-series-350-classic-meteor-hunter-bullet","title":"Royal Enfield 1570402 \/ 1570402\/B – Piston Oil Ring  for J-Series 350 – Classic 350 Reborn, Meteor 350, Hunter 350, Bullet 350 – Genuine OEM","description":"\u003cp data-start=\"327\" data-end=\"740\"\u003eThe \u003cstrong data-start=\"331\" data-end=\"388\"\u003eRoyal Enfield 1570402 \/ 1570402\/B – RING-PISTON (OIL)\u003c\/strong\u003e is the \u003cstrong data-start=\"396\" data-end=\"430\"\u003egenuine 3rd \/ oil control ring\u003c\/strong\u003e for the new-gen \u003cstrong data-start=\"447\" data-end=\"478\"\u003eJ-Series 350 (349cc) engine\u003c\/strong\u003e used in the \u003cstrong data-start=\"491\" data-end=\"556\"\u003eClassic 350 Reborn, Meteor 350, Hunter 350 and new Bullet 350\u003c\/strong\u003e. Official RE price lists describe 1570402\/B as \u003cstrong data-start=\"604\" data-end=\"627\"\u003e“RING-PISTON (OIL)”\u003c\/strong\u003e, and European parts portals list it as a genuine Royal Enfield oil ring.\u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1385\" data-end=\"1858\"\u003eThe oil ring’s job is to \u003cstrong data-start=\"1410\" data-end=\"1453\"\u003escrape excess oil off the cylinder wall\u003c\/strong\u003e and return it to the crankcase while leaving just a thin film for lubrication. A worn or damaged oil ring leads to \u003cstrong data-start=\"1569\" data-end=\"1622\"\u003eblue smoke, high oil consumption and fouled plugs\u003c\/strong\u003e. Replacing it with the correct \u003cstrong data-start=\"1654\" data-end=\"1671\"\u003eOEM 1570402\/B\u003c\/strong\u003e restores proper oil control and complements the 1st and 2nd compression rings (1570400\/1570401) in a full top-end rebuild of your J-Series engine. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"1860\" data-end=\"1863\"\u003e\n\u003ch3 data-start=\"1865\" data-end=\"1888\"\u003eKey Features \u003c\/h3\u003e\n\u003cul data-start=\"1890\" data-end=\"2967\"\u003e\n\u003cli data-start=\"1890\" data-end=\"2033\"\u003e\n\u003cp data-start=\"1892\" data-end=\"2033\"\u003e\u003cstrong data-start=\"1892\" data-end=\"1937\"\u003eGenuine Royal Enfield OEM piston oil ring\u003c\/strong\u003e – Part No. \u003cstrong data-start=\"1949\" data-end=\"1992\"\u003e1570402 \/ 1570402\/B – RING-PISTON (OIL)\u003c\/strong\u003e.\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2034\" data-end=\"2215\"\u003e\n\u003cp data-start=\"2036\" data-end=\"2215\"\u003eDesigned as the \u003cstrong data-start=\"2052\" data-end=\"2078\"\u003e3rd \/ oil control ring\u003c\/strong\u003e for the \u003cstrong data-start=\"2087\" data-end=\"2116\"\u003e349cc J-Series 350 engine\u003c\/strong\u003e used on Classic Reborn, Meteor, Hunter and new Bullet 350. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2216\" data-end=\"2373\"\u003e\n\u003cp data-start=\"2218\" data-end=\"2373\"\u003eCorrect \u003cstrong data-start=\"2226\" data-end=\"2243\"\u003estandard size\u003c\/strong\u003e ring as part of OEM ring set \u003cstrong data-start=\"2273\" data-end=\"2290\"\u003e1570400\/01\/02\u003c\/strong\u003e for J-Series 350 (1st, 2nd and oil rings). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2374\" data-end=\"2507\"\u003e\n\u003cp data-start=\"2376\" data-end=\"2507\"\u003eMaintains proper \u003cstrong data-start=\"2393\" data-end=\"2408\"\u003eoil control\u003c\/strong\u003e, reducing smoke, plug fouling and excessive oil consumption compared to local aftermarket rings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2508\" data-end=\"2619\"\u003e\n\u003cp data-start=\"2510\" data-end=\"2619\"\u003eMatches OEM material, tension and multi-piece design (where applicable) for reliable sealing and long life.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2620\" data-end=\"2723\"\u003e\n\u003cp data-start=\"2622\" data-end=\"2723\"\u003eIdeal when rebuilding a high-mileage J-Series 350 top-end or replacing a damaged or stuck oil ring.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2724\" data-end=\"2826\"\u003e\n\u003cp data-start=\"2726\" data-end=\"2826\"\u003eManufactured to \u003cstrong data-start=\"2742\" data-end=\"2770\"\u003eRoyal Enfield tolerances\u003c\/strong\u003e, ensuring correct side clearance and ring groove fit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2827\" data-end=\"2967\"\u003e\n\u003cp data-start=\"2829\" data-end=\"2967\"\u003eSupplied as \u003cstrong data-start=\"2841\" data-end=\"2857\"\u003eone oil ring\u003c\/strong\u003e – perfect if only the oil ring is being replaced or if you’re assembling a top-end from separate OEM parts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2969\" data-end=\"2972\"\u003e\n\u003ch3 data-start=\"2974\" data-end=\"3028\"\u003eCompatibility Table \u003c\/h3\u003e\n\u003cp data-start=\"3030\" data-end=\"3137\"\u003e\u003cstrong data-start=\"3030\" data-end=\"3044\"\u003eCore spec:\u003c\/strong\u003e Oil control ring (3rd ring) for \u003cstrong data-start=\"3077\" data-end=\"3136\"\u003eRoyal Enfield J-Series 350 (349cc, air-oil cooled, EFI)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"_tableContainer_1rjym_1\"\u003e\n\u003cdiv class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"3139\" data-end=\"4661\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"3139\" data-end=\"3272\"\u003e\n\u003ctr data-start=\"3139\" data-end=\"3272\"\u003e\n\u003cth data-start=\"3139\" data-end=\"3168\" data-col-size=\"sm\"\u003eModel\u003c\/th\u003e\n\u003cth data-start=\"3168\" data-end=\"3209\" data-col-size=\"sm\"\u003eEngine \/ Platform\u003c\/th\u003e\n\u003cth data-start=\"3209\" data-end=\"3227\" data-col-size=\"sm\"\u003eBS Stage\u003c\/th\u003e\n\u003cth data-start=\"3227\" data-end=\"3243\" data-col-size=\"sm\"\u003eApprox. Years\u003c\/th\u003e\n\u003cth data-start=\"3243\" data-end=\"3260\" data-col-size=\"sm\"\u003eFitment Status\u003c\/th\u003e\n\u003cth data-start=\"3260\" data-end=\"3272\" data-col-size=\"xl\"\u003eEvidence\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"3406\" data-end=\"4661\"\u003e\n\u003ctr data-start=\"3406\" data-end=\"3735\"\u003e\n\u003ctd data-start=\"3406\" data-end=\"3435\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"3408\" data-end=\"3430\"\u003eClassic 350 Reborn\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"3435\" data-end=\"3476\" data-col-size=\"sm\"\u003e349cc single-cyl J-Series, EFI\u003c\/td\u003e\n\u003ctd data-start=\"3476\" data-end=\"3494\" data-col-size=\"sm\"\u003eBS6 \/ BS6.2\u003c\/td\u003e\n\u003ctd data-start=\"3494\" data-end=\"3509\" data-col-size=\"sm\"\u003e2021–onwards\u003c\/td\u003e\n\u003ctd data-start=\"3509\" data-end=\"3526\" data-col-size=\"sm\"\u003e✔ Confirmed\u003c\/td\u003e\n\u003ctd data-start=\"3526\" data-end=\"3735\" data-col-size=\"xl\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3736\" data-end=\"4069\"\u003e\n\u003ctd data-start=\"3736\" data-end=\"3765\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"3738\" data-end=\"3752\"\u003eMeteor 350\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"3765\" data-end=\"3806\" data-col-size=\"sm\"\u003e349cc J-Series, air-oil cooled, EFI\u003c\/td\u003e\n\u003ctd data-start=\"3806\" data-end=\"3824\" data-col-size=\"sm\"\u003eBS6 \/ BS6.2\u003c\/td\u003e\n\u003ctd data-start=\"3824\" data-end=\"3839\" data-col-size=\"sm\"\u003e2020–onwards\u003c\/td\u003e\n\u003ctd data-start=\"3839\" data-end=\"3856\" data-col-size=\"sm\"\u003e✔ Confirmed\u003c\/td\u003e\n\u003ctd data-start=\"3856\" data-end=\"4069\" data-col-size=\"xl\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4070\" data-end=\"4372\"\u003e\n\u003ctd data-start=\"4070\" data-end=\"4099\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"4072\" data-end=\"4086\"\u003eHunter 350\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"4099\" data-end=\"4140\" data-col-size=\"sm\"\u003e349cc J-Series, single-cyl EFI\u003c\/td\u003e\n\u003ctd data-start=\"4140\" data-end=\"4158\" data-col-size=\"sm\"\u003eBS6 \/ BS6.2\u003c\/td\u003e\n\u003ctd data-start=\"4158\" data-end=\"4173\" data-col-size=\"sm\"\u003e2022–onwards\u003c\/td\u003e\n\u003ctd data-start=\"4173\" data-end=\"4190\" data-col-size=\"sm\"\u003e✔ Confirmed\u003c\/td\u003e\n\u003ctd data-start=\"4190\" data-end=\"4372\" data-col-size=\"xl\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4373\" data-end=\"4661\"\u003e\n\u003ctd data-start=\"4373\" data-end=\"4405\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"4375\" data-end=\"4404\"\u003eBullet 350 (new J-Series)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"4405\" data-end=\"4442\" data-col-size=\"sm\"\u003e349cc J-Series, EFI\u003c\/td\u003e\n\u003ctd data-start=\"4442\" data-end=\"4460\" data-col-size=\"sm\"\u003eBS6 \/ BS6.2\u003c\/td\u003e\n\u003ctd data-start=\"4460\" data-end=\"4475\" data-col-size=\"sm\"\u003e2023–onwards\u003c\/td\u003e\n\u003ctd data-start=\"4475\" data-end=\"4492\" data-col-size=\"sm\"\u003e✔ Confirmed\u003c\/td\u003e\n\u003ctd data-start=\"4492\" data-end=\"4661\" data-col-size=\"xl\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"4663\" data-end=\"4711\"\u003ePLEASE CHECK PART NUMBER BEFORE PURCHASE \u003c\/p\u003e\n\u003chr data-start=\"5000\" data-end=\"5003\"\u003e\n\u003ch3 data-start=\"5005\" data-end=\"5017\"\u003eVariants\u003c\/h3\u003e\n\u003cul data-start=\"5019\" data-end=\"5287\"\u003e\n\u003cli data-start=\"5019\" data-end=\"5287\"\u003e\n\u003cp data-start=\"5021\" data-end=\"5057\"\u003e\u003cstrong data-start=\"5021\" data-end=\"5055\"\u003eSingle Variant (this listing):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"5060\" data-end=\"5287\"\u003e\n\u003cli data-start=\"5060\" data-end=\"5100\"\u003e\n\u003cp data-start=\"5062\" data-end=\"5100\"\u003ePart Number: \u003cstrong data-start=\"5075\" data-end=\"5098\"\u003e1570402 \/ 1570402\/B\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5103\" data-end=\"5143\"\u003e\n\u003cp data-start=\"5105\" data-end=\"5143\"\u003eType: \u003cstrong data-start=\"5111\" data-end=\"5141\"\u003ePiston Oil Ring \u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5146\" data-end=\"5182\"\u003e\n\u003cp data-start=\"5148\" data-end=\"5182\"\u003eEngine: \u003cstrong data-start=\"5156\" data-end=\"5180\"\u003eJ-Series 350 – 349cc\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5185\" data-end=\"5287\"\u003e\n\u003cp data-start=\"5187\" data-end=\"5287\"\u003eSize: \u003cstrong data-start=\"5193\" data-end=\"5210\"\u003eStandard bore\u003c\/strong\u003e (no oversize suffix in OEM lists). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5289\" data-end=\"5375\"\u003e(For a complete rebuild, pair with \u003cstrong data-start=\"5324\" data-end=\"5335\"\u003e1570400\u003c\/strong\u003e – 1st ring and \u003cstrong data-start=\"5351\" data-end=\"5362\"\u003e1570401\u003c\/strong\u003e – 2nd ring.)\u003c\/p\u003e\n\u003chr data-start=\"5377\" data-end=\"5380\"\u003e\n\u003ch3 data-start=\"5382\" data-end=\"5396\"\u003eFAQs\u003c\/h3\u003e\n\u003cp data-start=\"5398\" data-end=\"5667\"\u003e\u003cstrong data-start=\"5398\" data-end=\"5456\"\u003eQ1. Is 1570402 the full ring set or only the oil ring?\u003c\/strong\u003e\u003cbr data-start=\"5456\" data-end=\"5459\"\u003eIt is \u003cstrong data-start=\"5465\" data-end=\"5505\"\u003eonly the oil control ring \u003c\/strong\u003e. The full J-Series ring set is usually listed as \u003cstrong data-start=\"5555\" data-end=\"5572\"\u003e1570400\/01\/02\u003c\/strong\u003e, which includes the 1st, 2nd and oil rings together. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"5669\" data-end=\"5951\"\u003e\u003cstrong data-start=\"5669\" data-end=\"5757\"\u003eQ2. Will this oil ring fit my Classic 350 Reborn \/ Meteor \/ Hunter \/ new Bullet 350?\u003c\/strong\u003e\u003cbr data-start=\"5757\" data-end=\"5760\"\u003eYes – multiple genuine-parts sellers and kits clearly list \u003cstrong data-start=\"5819\" data-end=\"5830\"\u003e1570402\u003c\/strong\u003e for \u003cstrong data-start=\"5835\" data-end=\"5908\"\u003eAll New Classic 350, Meteor 350, Hunter 350 and Bullet 350 (J-Series)\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"5953\" data-end=\"6260\"\u003e\u003cstrong data-start=\"5953\" data-end=\"6025\"\u003eQ3. Can I install 1570402 in an older UCE Classic 350 or Bullet 350?\u003c\/strong\u003e\u003cbr data-start=\"6025\" data-end=\"6028\"\u003eNo. Older UCE and cast-iron engines use different piston and ring part numbers. \u003cstrong data-start=\"6108\" data-end=\"6164\"\u003e1570402\/B is specific to the J-Series 349cc platform\u003c\/strong\u003e and should not be used on UCE \/ CI motors without explicit confirmation from the RE microfiche.\u003c\/p\u003e\n\u003cp data-start=\"6262\" data-end=\"6564\"\u003e\u003cstrong data-start=\"6262\" data-end=\"6309\"\u003eQ4. Is this ring standard size or oversize?\u003c\/strong\u003e\u003cbr data-start=\"6309\" data-end=\"6312\"\u003eOEM price lists and parts portals only list \u003cstrong data-start=\"6356\" data-end=\"6389\"\u003e1570402\/B – RING-PISTON (OIL)\u003c\/strong\u003e with no oversize code, and it appears in the \u003cstrong data-start=\"6435\" data-end=\"6447\"\u003estandard\u003c\/strong\u003e piston ring kit for J-Series 350. Treat this listing as \u003cstrong data-start=\"6504\" data-end=\"6521\"\u003estandard bore\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"6566\" data-end=\"6901\"\u003e\u003cstrong data-start=\"6566\" data-end=\"6621\"\u003eQ5. Should I change all rings or only the oil ring?\u003c\/strong\u003e\u003cbr data-start=\"6621\" data-end=\"6624\"\u003eBest practice during an overhaul is to replace the \u003cstrong data-start=\"6675\" data-end=\"6712\"\u003efull set (1st, 2nd and oil rings)\u003c\/strong\u003e and check piston\/cylinder clearance and ring end-gaps to spec. Replacing only the oil ring is acceptable in very specific repair scenarios and should be decided by an experienced mechanic.\u003c\/p\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":50690437644583,"sku":null,"price":87.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/1570402_Ring_Piston_Oil.png?v=1763196777","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-1570402-oil-piston-ring-j-series-350-classic-meteor-hunter-bullet","provider":"UNDER THE HOOD","version":"1.0","type":"link"}