{"product_id":"royal-enfield-cylinder-barrel-assy-textured-black-vt31-bullet-350-ks-bs3-890055","title":"Royal Enfield Genuine Cylinder Barrel Assembly (Cylinder Block) Textured Black VT31 for Bullet 350 UCE Kick Start BS3 – 890055","description":"\u003cp data-start=\"257\" data-end=\"768\"\u003e\u003cstrong data-start=\"299\" data-end=\"309\"\u003e890055\u003c\/strong\u003e is a \u003cstrong data-start=\"315\" data-end=\"397\"\u003eRoyal Enfield Genuine Cylinder Barrel Assembly (Cylinder Block \/ Barrel \/ Jug)\u003c\/strong\u003e finished in \u003cstrong data-start=\"410\" data-end=\"428\"\u003eTextured Black\u003c\/strong\u003e for the \u003cstrong data-start=\"437\" data-end=\"455\"\u003eVT31 (UCE 350)\u003c\/strong\u003e engine family. It’s the core top-end component that houses the piston\/rings and forms the cylinder bore—critical for compression, oil control, and long-term engine reliability. This part is listed by independent OEM dealers as fitting \u003cstrong data-start=\"691\" data-end=\"729\"\u003eBullet 350 Kick Start (KS) – BSIII\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"770\" data-end=\"1112\"\u003eReplace the barrel when the bore is \u003cstrong data-start=\"806\" data-end=\"816\"\u003escored\u003c\/strong\u003e, out-of-round, or worn beyond safe honing, or when you’re seeing \u003cstrong data-start=\"882\" data-end=\"901\"\u003elow compression\u003c\/strong\u003e, \u003cstrong data-start=\"903\" data-end=\"918\"\u003eoil burning\u003c\/strong\u003e, \u003cstrong data-start=\"920\" data-end=\"940\"\u003esmoke under load\u003c\/strong\u003e, repeated \u003cstrong data-start=\"951\" data-end=\"967\"\u003eplug fouling\u003c\/strong\u003e, or piston slap noise after a rebuild. OEM machining and bore finish matter here—wrong tolerances can cause early ring wear and repeat failures.\u003c\/p\u003e\n\u003cp data-start=\"1114\" data-end=\"1248\"\u003eAlso searched as: \u003cstrong data-start=\"1132\" data-end=\"1159\"\u003eUCE 350 cylinder barrel\u003c\/strong\u003e, \u003cstrong data-start=\"1161\" data-end=\"1193\"\u003eBullet 350 KS cylinder block\u003c\/strong\u003e, \u003cstrong data-start=\"1195\" data-end=\"1212\"\u003eengine barrel\u003c\/strong\u003e, \u003cstrong data-start=\"1214\" data-end=\"1230\"\u003ecylinder jug\u003c\/strong\u003e, \u003cstrong data-start=\"1232\" data-end=\"1247\"\u003eVT31 barrel\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1250\" data-end=\"1391\"\u003e\u003cstrong data-start=\"1250\" data-end=\"1269\"\u003eBefore you buy:\u003c\/strong\u003e Confirm \u003cstrong data-start=\"1278\" data-end=\"1296\"\u003eUCE 350 (VT31)\u003c\/strong\u003e + \u003cstrong data-start=\"1299\" data-end=\"1319\"\u003eKick Start BSIII\u003c\/strong\u003e on RC\/engine and match your old barrel\/finish by photo before dispatch.\u003c\/p\u003e\n\u003cp data-start=\"1396\" data-end=\"1429\"\u003e\u003cstrong data-start=\"1396\" data-end=\"1427\"\u003eKey Features \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1430\" data-end=\"2235\"\u003e\n\u003cli data-start=\"1430\" data-end=\"1560\"\u003e\n\u003cp data-start=\"1432\" data-end=\"1560\"\u003eGenuine Royal Enfield part: \u003cstrong data-start=\"1460\" data-end=\"1504\"\u003eCYLINDER BARREL ASSY TEXTURED BLACK–VT31\u003c\/strong\u003e (PN \u003cstrong data-start=\"1509\" data-end=\"1519\"\u003e890055\u003c\/strong\u003e) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1561\" data-end=\"1671\"\u003e\n\u003cp data-start=\"1563\" data-end=\"1671\"\u003eFitment listed for \u003cstrong data-start=\"1582\" data-end=\"1607\"\u003eBullet 350 KS – BSIII\u003c\/strong\u003e by multiple OEM dealers \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1672\" data-end=\"1761\"\u003e\n\u003cp data-start=\"1674\" data-end=\"1761\"\u003eCorrect OEM bore finish\/tolerance for reliable ring sealing and compression retention\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1762\" data-end=\"1867\"\u003e\n\u003cp data-start=\"1764\" data-end=\"1867\"\u003eFixes root causes of low compression due to bore scoring\/out-of-round wear (when barrel is the issue)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1868\" data-end=\"1951\"\u003e\n\u003cp data-start=\"1870\" data-end=\"1951\"\u003eBest choice for professional top-end rebuilds (avoid “similar-looking” barrels)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1952\" data-end=\"2031\"\u003e\n\u003cp data-start=\"1954\" data-end=\"2031\"\u003eHelps reduce repeat rebuild risk caused by inaccurate aftermarket machining\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2032\" data-end=\"2118\"\u003e\n\u003cp data-start=\"2034\" data-end=\"2118\"\u003eImportant return-prevention: order by \u003cstrong data-start=\"2072\" data-end=\"2116\"\u003epart number + platform (VT31) + BS stage\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2119\" data-end=\"2235\"\u003e\n\u003cp data-start=\"2121\" data-end=\"2235\"\u003eSupersession-aware: older numbers can map to \u003cstrong data-start=\"2166\" data-end=\"2176\"\u003e890055\u003c\/strong\u003e (see Research Log) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2240\" data-end=\"2276\"\u003e\u003cstrong data-start=\"2240\" data-end=\"2274\"\u003eCompatibility Table \u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"2278\" data-end=\"3188\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"2278\" data-end=\"2362\"\u003e\n\u003ctr data-start=\"2278\" data-end=\"2362\"\u003e\n\u003cth data-start=\"2278\" data-end=\"2286\" data-col-size=\"sm\" class=\"\"\u003eModel\u003c\/th\u003e\n\u003cth data-start=\"2286\" data-end=\"2304\" data-col-size=\"sm\" class=\"\"\u003ePlatform\/Engine\u003c\/th\u003e\n\u003cth data-start=\"2304\" data-end=\"2318\" data-col-size=\"sm\" class=\"\"\u003eBS\/Emission\u003c\/th\u003e\n\u003cth data-start=\"2318\" data-end=\"2326\" data-col-size=\"sm\" class=\"\"\u003eYears\u003c\/th\u003e\n\u003cth data-start=\"2326\" data-end=\"2341\" data-col-size=\"sm\" class=\"\"\u003eStatus (✅\/❓)\u003c\/th\u003e\n\u003cth data-start=\"2341\" data-end=\"2362\" data-col-size=\"lg\" class=\"\"\u003eNotes\/Constraints\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2389\" data-end=\"3188\"\u003e\n\u003ctr data-start=\"2389\" data-end=\"2624\"\u003e\n\u003ctd data-start=\"2389\" data-end=\"2418\" data-col-size=\"sm\"\u003eBullet 350 Kick Start (KS)\u003c\/td\u003e\n\u003ctd data-start=\"2418\" data-end=\"2435\" data-col-size=\"sm\"\u003eUCE 350 (VT31)\u003c\/td\u003e\n\u003ctd data-start=\"2435\" data-end=\"2443\" data-col-size=\"sm\"\u003eBSIII\u003c\/td\u003e\n\u003ctd data-start=\"2443\" data-end=\"2469\" data-col-size=\"sm\"\u003eBSIII production period\u003c\/td\u003e\n\u003ctd data-start=\"2469\" data-end=\"2473\" data-col-size=\"sm\"\u003e✅\u003c\/td\u003e\n\u003ctd data-start=\"2473\" data-end=\"2624\" data-col-size=\"lg\"\u003eDealer fitment mapping states \u003cstrong data-start=\"2505\" data-end=\"2530\"\u003eBULLET 350 KS – BSIII\u003c\/strong\u003e. Verify via RC\/engine + barrel photo before ordering. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2625\" data-end=\"2795\"\u003e\n\u003ctd data-start=\"2625\" data-end=\"2658\" data-col-size=\"sm\"\u003eBullet 350 Electric Start (ES)\u003c\/td\u003e\n\u003ctd data-start=\"2658\" data-end=\"2668\" data-col-size=\"sm\"\u003eUCE 350\u003c\/td\u003e\n\u003ctd data-start=\"2668\" data-end=\"2681\" data-col-size=\"sm\"\u003eBSIII\/BSIV\u003c\/td\u003e\n\u003ctd data-start=\"2681\" data-end=\"2685\" data-col-size=\"sm\"\u003e—\u003c\/td\u003e\n\u003ctd data-start=\"2685\" data-end=\"2689\" data-col-size=\"sm\"\u003e❓\u003c\/td\u003e\n\u003ctd data-start=\"2689\" data-end=\"2795\" data-col-size=\"lg\"\u003eNot confirmed for PN 890055 in verified dealer mapping. Must verify by VIN\/EPC or matching old barrel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2796\" data-end=\"2915\"\u003e\n\u003ctd data-start=\"2796\" data-end=\"2814\" data-col-size=\"sm\"\u003eClassic 350 UCE\u003c\/td\u003e\n\u003ctd data-start=\"2814\" data-end=\"2824\" data-col-size=\"sm\"\u003eUCE 350\u003c\/td\u003e\n\u003ctd data-start=\"2824\" data-end=\"2837\" data-col-size=\"sm\"\u003eBSIII\/BSIV\u003c\/td\u003e\n\u003ctd data-start=\"2837\" data-end=\"2841\" data-col-size=\"sm\"\u003e—\u003c\/td\u003e\n\u003ctd data-start=\"2841\" data-end=\"2845\" data-col-size=\"sm\"\u003e❓\u003c\/td\u003e\n\u003ctd data-start=\"2845\" data-end=\"2915\" data-col-size=\"lg\"\u003eNot confirmed. Do not assume interchangeability across UCE models.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2916\" data-end=\"2983\"\u003e\n\u003ctd data-start=\"2916\" data-end=\"2934\" data-col-size=\"sm\"\u003eThunderbird 350\u003c\/td\u003e\n\u003ctd data-start=\"2934\" data-end=\"2944\" data-col-size=\"sm\"\u003eUCE 350\u003c\/td\u003e\n\u003ctd data-start=\"2944\" data-end=\"2957\" data-col-size=\"sm\"\u003eBSIII\/BSIV\u003c\/td\u003e\n\u003ctd data-start=\"2957\" data-end=\"2961\" data-col-size=\"sm\"\u003e—\u003c\/td\u003e\n\u003ctd data-start=\"2961\" data-end=\"2965\" data-col-size=\"sm\"\u003e❓\u003c\/td\u003e\n\u003ctd data-start=\"2965\" data-end=\"2983\" data-col-size=\"lg\"\u003eNot confirmed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2984\" data-end=\"3070\"\u003e\n\u003ctd data-start=\"2984\" data-end=\"3005\" data-col-size=\"sm\"\u003eContinental GT 535\u003c\/td\u003e\n\u003ctd data-start=\"3005\" data-end=\"3015\" data-col-size=\"sm\"\u003eUCE 535\u003c\/td\u003e\n\u003ctd data-start=\"3015\" data-end=\"3019\" data-col-size=\"sm\"\u003e—\u003c\/td\u003e\n\u003ctd data-start=\"3019\" data-end=\"3023\" data-col-size=\"sm\"\u003e—\u003c\/td\u003e\n\u003ctd data-start=\"3023\" data-end=\"3027\" data-col-size=\"sm\"\u003e❓\u003c\/td\u003e\n\u003ctd data-start=\"3027\" data-end=\"3070\" data-col-size=\"lg\"\u003eNot confirmed; different engine family.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3071\" data-end=\"3188\"\u003e\n\u003ctd data-start=\"3071\" data-end=\"3107\" data-col-size=\"sm\"\u003eClassic 350 Reborn \/ J-Series 350\u003c\/td\u003e\n\u003ctd data-start=\"3107\" data-end=\"3118\" data-col-size=\"sm\"\u003eJ-Series\u003c\/td\u003e\n\u003ctd data-start=\"3118\" data-end=\"3124\" data-col-size=\"sm\"\u003eBS6\u003c\/td\u003e\n\u003ctd data-start=\"3124\" data-end=\"3128\" data-col-size=\"sm\"\u003e—\u003c\/td\u003e\n\u003ctd data-start=\"3128\" data-end=\"3132\" data-col-size=\"sm\"\u003e❓\u003c\/td\u003e\n\u003ctd data-start=\"3132\" data-end=\"3188\" data-col-size=\"lg\"\u003eNot compatible platform; order J-series barrel only.\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=\"3190\" data-end=\"3350\"\u003e\u003cspan style=\"color: rgb(250, 10, 10);\"\u003e\u003cstrong data-start=\"3190\" data-end=\"3234\"\u003eORDER ONLY AFTER PART NUMBER CONFIRMATION \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3190\" data-end=\"3350\"\u003e\u003cstrong data-start=\"3190\" data-end=\"3234\"\u003eExplicit exclusions (return-prevention):\u003c\/strong\u003e Do not buy for \u003cstrong data-start=\"3250\" data-end=\"3266\"\u003eJ-Series 350\u003c\/strong\u003e, and do not assume fitment for \u003cstrong data-start=\"3298\" data-end=\"3318\"\u003eES\/Classic\/TBird\u003c\/strong\u003e without VIN\/photo confirmation.\u003c\/p\u003e\n\u003cp data-start=\"3355\" data-end=\"3382\"\u003e\u003cstrong data-start=\"3355\" data-end=\"3367\"\u003eVariants\u003c\/strong\u003e\u003cbr data-start=\"3367\" data-end=\"3370\"\u003eNo variants.\u003c\/p\u003e\n\u003cp data-start=\"3387\" data-end=\"3431\"\u003e\u003cstrong data-start=\"3387\" data-end=\"3429\"\u003eFAQs \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"3433\" data-end=\"3804\"\u003e\u003cstrong data-start=\"3433\" data-end=\"3498\"\u003eQ1 (Fitment): How do I confirm 890055 is correct for my bike?\u003c\/strong\u003e\u003cbr data-start=\"3498\" data-end=\"3501\"\u003eConfirm \u003cstrong data-start=\"3509\" data-end=\"3539\"\u003eBullet 350 Kick Start (KS)\u003c\/strong\u003e and \u003cstrong data-start=\"3544\" data-end=\"3553\"\u003eBSIII\u003c\/strong\u003e on your RC\/engine family (VT31 UCE 350), then match the existing barrel by photo (cooling fin pattern\/finish) or verify by VIN in official EPC at a dealer. Dealer mapping lists it for \u003cstrong data-start=\"3738\" data-end=\"3763\"\u003eBullet 350 KS – BSIII\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3806\" data-end=\"4061\"\u003e\u003cstrong data-start=\"3806\" data-end=\"3873\"\u003eQ2 (Fitment): Will 890055 fit Bullet 350 ES or Classic 350 UCE?\u003c\/strong\u003e\u003cbr data-start=\"3873\" data-end=\"3876\"\u003eNot confirmed in the verified fitment mapping for this part number. UCE 350 barrels can differ by application\/finish\/spec. Order only after VIN\/EPC confirmation or exact old-part match.\u003c\/p\u003e\n\u003cp data-start=\"4063\" data-end=\"4351\"\u003e\u003cstrong data-start=\"4063\" data-end=\"4144\"\u003eQ3 (Comparison): OEM barrel vs aftermarket barrel—what’s the real difference?\u003c\/strong\u003e\u003cbr data-start=\"4144\" data-end=\"4147\"\u003eOEM barrels are manufactured to RE’s bore tolerance and surface finish specification. Aftermarket barrels can vary in machining accuracy, which may cause early ring wear, overheating, and repeat rebuilds.\u003c\/p\u003e\n\u003cp data-start=\"4353\" data-end=\"4640\"\u003e\u003cstrong data-start=\"4353\" data-end=\"4426\"\u003eQ4 (Installation): What should my mechanic check during installation?\u003c\/strong\u003e\u003cbr data-start=\"4426\" data-end=\"4429\"\u003eMeasure bore and piston clearance, check ring end-gap, use new gaskets, follow torque sequence, and ensure oiling passages are clean. This is a top-end rebuild component—professional installation is recommended.\u003c\/p\u003e\n\u003cp data-start=\"4642\" data-end=\"4862\"\u003e\u003cstrong data-start=\"4642\" data-end=\"4708\"\u003eQ5 (Symptoms): What problems does a new cylinder barrel solve?\u003c\/strong\u003e\u003cbr data-start=\"4708\" data-end=\"4711\"\u003eLow compression, excessive blow-by, oil burning\/smoke, scored bore, piston slap noise, repeated plug fouling—when diagnosis points to bore wear\/damage.\u003c\/p\u003e\n\u003cp data-start=\"4864\" data-end=\"5118\"\u003e\u003cstrong data-start=\"4864\" data-end=\"4947\"\u003eQ6 (Returns-prevention): What should I share before ordering to avoid mismatch?\u003c\/strong\u003e\u003cbr data-start=\"4947\" data-end=\"4950\"\u003eShare RC details (model + \u003cstrong data-start=\"4976\" data-end=\"4985\"\u003eKS\/ES\u003c\/strong\u003e + BS stage), plus clear photos of your current barrel and engine area. If you have VIN, use it for EPC verification before dispatch.\u003c\/p\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":51011618865447,"sku":null,"price":3305.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/890055-cylinder-barrel-assy-textured-black-vt31-bullet-350.png?v=1770311833","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-cylinder-barrel-assy-textured-black-vt31-bullet-350-ks-bs3-890055","provider":"UNDER THE HOOD","version":"1.0","type":"link"}