{"product_id":"royal-enfield-classic-350-bs3-carburetor-flange-kit-klt00001","title":"Royal Enfield Classic 350 (BS3 Carb) Carburetor Flange Kit \/ Intake Manifold Rubber – KLT00001","description":"\u003cp data-end=\"708\" data-start=\"240\"\u003eA worn carburetor flange (intake manifold rubber) is one of the most common hidden causes of unstable idling, air-leak hunting, backfiring on decel, and poor throttle response on carbureted Royal Enfield 350s. The \u003cstrong data-end=\"504\" data-start=\"454\"\u003eRoyal Enfield Carburetor Flange Kit – KLT00001\u003c\/strong\u003e is the correct replacement flange kit used on \u003cstrong data-end=\"596\" data-start=\"551\"\u003eClassic 350 carburetor (BS3) applications\u003c\/strong\u003e and restores an airtight seal between the carburetor and cylinder head. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1079\" data-start=\"710\"\u003eUnlike many soft aftermarket rubbers that crack early from heat and fuel vapors, an OE-spec flange kit is designed for the engine bay temperature cycles and long-term sealing—critical for reliable cold starts and consistent fueling. This is a small part, but it directly affects rideability and can prevent repeated carb tuning problems caused by unmetered air leaks.\u003c\/p\u003e\n\u003cp data-end=\"1277\" data-start=\"1081\"\u003eIf your Classic 350 is \u003cstrong data-end=\"1128\" data-start=\"1104\"\u003ecarbureted (BS3-era)\u003c\/strong\u003e and you see visible cracks on the intake rubber or experience erratic idle even after carb cleaning, replacing the flange is a highly effective fix.\u003c\/p\u003e\n\u003ch2 data-end=\"1303\" data-start=\"1279\"\u003eKey Features \u003c\/h2\u003e\n\u003cul data-end=\"2008\" data-start=\"1304\"\u003e\n\u003cli data-end=\"1423\" data-start=\"1304\"\u003e\n\u003cp data-end=\"1423\" data-start=\"1306\"\u003eGenuine-spec \u003cstrong data-end=\"1344\" data-start=\"1319\"\u003eCarburetor Flange Kit\u003c\/strong\u003e identified by part number \u003cstrong data-end=\"1383\" data-start=\"1371\"\u003eKLT00001\u003c\/strong\u003e \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1529\" data-start=\"1424\"\u003e\n\u003cp data-end=\"1529\" data-start=\"1426\"\u003eApplication noted for \u003cstrong data-end=\"1489\" data-start=\"1448\"\u003eClassic 350 carburetor assembly (BS3)\u003c\/strong\u003e \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1624\" data-start=\"1530\"\u003e\n\u003cp data-end=\"1624\" data-start=\"1532\"\u003eHelps eliminate \u003cstrong data-end=\"1561\" data-start=\"1548\"\u003eair leaks\u003c\/strong\u003e that cause hunting idle and lean running (common carb issue)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1704\" data-start=\"1625\"\u003e\n\u003cp data-end=\"1704\" data-start=\"1627\"\u003eRestores proper seal between carb and intake for smoother throttle response\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1767\" data-start=\"1705\"\u003e\n\u003cp data-end=\"1767\" data-start=\"1707\"\u003eIdeal preventive replacement during carb overhaul \/ tuning\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1885\" data-start=\"1768\"\u003e\n\u003cp data-end=\"1885\" data-start=\"1770\"\u003eListed under UCAL branding on dealer catalog (as shown in listing metadata) \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2008\" data-start=\"1886\"\u003e\n\u003cp data-end=\"2008\" data-start=\"1888\"\u003eOEM part-number reference also shown as \u003cstrong data-end=\"1942\" data-start=\"1928\"\u003eKLT00001\/A\u003c\/strong\u003e by an export parts seller \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"2051\" data-start=\"2010\"\u003eCompatibility Table (Confirmed Only)\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-end=\"2313\" data-start=\"2052\"\u003e\n\u003cthead data-end=\"2131\" data-start=\"2052\"\u003e\n\u003ctr data-end=\"2131\" data-start=\"2052\"\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2060\" data-start=\"2052\"\u003eModel\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2080\" data-start=\"2060\"\u003eEngine \/ Platform\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2094\" data-start=\"2080\"\u003eFuel System\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2105\" data-start=\"2094\"\u003eBS Stage\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2113\" data-start=\"2105\"\u003eYears\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2131\" data-start=\"2113\"\u003eFitment Status\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"2313\" data-start=\"2158\"\u003e\n\u003ctr data-end=\"2313\" data-start=\"2158\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2190\" data-start=\"2158\"\u003eRoyal Enfield \u003cstrong data-end=\"2189\" data-start=\"2174\"\u003eClassic 350\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2200\" data-start=\"2190\"\u003eUCE 350\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2217\" data-start=\"2200\"\u003e\u003cstrong data-end=\"2216\" data-start=\"2202\"\u003eCarburetor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2227\" data-start=\"2217\"\u003e\u003cstrong data-end=\"2226\" data-start=\"2219\"\u003eBS3\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2260\" data-start=\"2227\"\u003e\u003cstrong data-end=\"2259\" data-start=\"2229\"\u003eVerify via RC \/ carb model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2313\" data-start=\"2260\"\u003e✅ Confirmed \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cul data-end=\"2810\" data-start=\"2604\"\u003e\n\u003cli data-end=\"2810\" data-start=\"2693\"\u003e\n\u003cp data-end=\"2810\" data-start=\"2695\"\u003e\u003cspan style=\"color: rgb(251, 4, 4);\"\u003e\u003cstrong\u003ePLEASE CHECK PART NUMBER BEFORE PURCHASE \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"2825\" data-start=\"2812\"\u003eVariants\u003c\/h2\u003e\n\u003cul data-end=\"2864\" data-start=\"2826\"\u003e\n\u003cli data-end=\"2864\" data-start=\"2826\"\u003e\n\u003cp data-end=\"2864\" data-start=\"2828\"\u003e\u003cstrong data-end=\"2843\" data-start=\"2828\"\u003eNo variants\u003c\/strong\u003e (single kit listing)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-end=\"2901\" data-start=\"2866\"\u003eFAQs \u003c\/h2\u003e\n\u003col data-end=\"4238\" data-start=\"2902\"\u003e\n\u003cli data-end=\"3115\" data-start=\"2902\"\u003e\n\u003cp data-end=\"3115\" data-start=\"2905\"\u003e\u003cstrong data-end=\"2954\" data-start=\"2905\"\u003eWhat is a “carburetor flange” on Classic 350?\u003c\/strong\u003e\u003cbr data-end=\"2957\" data-start=\"2954\"\u003eIt’s the rubber\/insulator piece between the carburetor and the engine intake. If it cracks or hardens, it creates an air leak and the bike runs lean\/unsteady.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3348\" data-start=\"3117\"\u003e\n\u003cp data-end=\"3348\" data-start=\"3120\"\u003e\u003cstrong data-end=\"3173\" data-start=\"3120\"\u003eHow do I confirm my bike is BS3 carburetor model?\u003c\/strong\u003e\u003cbr data-end=\"3176\" data-start=\"3173\"\u003eCheck your RC\/registration (BS stage), and physically confirm you have a \u003cstrong data-end=\"3263\" data-start=\"3249\"\u003ecarburetor\u003c\/strong\u003e (not EFI throttle body). If it’s EFI\/BS4\/BS6, this part is typically not applicable.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3569\" data-start=\"3350\"\u003e\n\u003cp data-end=\"3569\" data-start=\"3353\"\u003e\u003cstrong data-end=\"3417\" data-start=\"3353\"\u003eSymptoms of a damaged flange—how do I know it’s the problem?\u003c\/strong\u003e\u003cbr data-end=\"3420\" data-start=\"3417\"\u003eCommon signs: fluctuating idle, engine stalling at idle, popping\/backfire on decel, hard starting, and tuning that never “holds” after carb cleaning.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"3842\" data-start=\"3571\"\u003e\n\u003cp data-end=\"3842\" data-start=\"3574\"\u003e\u003cstrong data-end=\"3613\" data-start=\"3574\"\u003eIs KLT00001 the same as KLT00001\/A?\u003c\/strong\u003e\u003cbr data-end=\"3616\" data-start=\"3613\"\u003eSome catalogs show the same item with a suffix (example: \u003cstrong data-end=\"3687\" data-start=\"3673\"\u003eKLT00001\/A\u003c\/strong\u003e). Treat the \u003cstrong data-end=\"3737\" data-start=\"3700\"\u003ecore part number as the match key\u003c\/strong\u003e and verify via microfiche\/authorized catalog before dispatching. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"4037\" data-start=\"3844\"\u003e\n\u003cp data-end=\"4037\" data-start=\"3847\"\u003e\u003cstrong data-end=\"3902\" data-start=\"3847\"\u003eShould I replace this during carb cleaning\/service?\u003c\/strong\u003e\u003cbr data-end=\"3905\" data-start=\"3902\"\u003eYes—if the rubber shows cracks, is oil-soaked, or has hardened. Replacing it during a carb overhaul prevents repeat air-leak issues.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"4238\" data-start=\"4039\"\u003e\n\u003cp data-end=\"4238\" data-start=\"4042\"\u003e\u003cstrong data-end=\"4087\" data-start=\"4042\"\u003eDoes this kit include clamps\/extra items?\u003c\/strong\u003e\u003cbr data-end=\"4090\" data-start=\"4087\"\u003e“Kit” contents can vary by packaging batch. Best practice: match the delivered contents to the product photos and your old part before installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":50892397609255,"sku":null,"price":0.0,"currency_code":"INR","in_stock":false}],"url":"https:\/\/underthehood.co.in\/products\/royal-enfield-classic-350-bs3-carburetor-flange-kit-klt00001","provider":"UNDER THE HOOD","version":"1.0","type":"link"}