{"product_id":"royal-enfield-klt00003-e20-carburetor-kit-uce-350-bs3","title":"E20 Carburetor Kit for Royal Enfield UCE 350 BS3 (Carb Models) – KLT00003\/A (Not for EFI \/ Not for BS4)","description":"\u003cp data-end=\"678\" data-start=\"192\"\u003eRoyal Enfield \u003cstrong data-end=\"262\" data-start=\"248\"\u003eKLT00003\/A\u003c\/strong\u003e is an \u003cstrong data-end=\"291\" data-start=\"269\"\u003eE20 Carburetor Kit\u003c\/strong\u003e intended for \u003cstrong data-end=\"339\" data-start=\"305\"\u003eUCE 350 BS3 carbureted engines\u003c\/strong\u003e—a factory-style replacement carb kit designed for ethanol-blended petrol usage. If your older UCE 350 carb bike has started showing \u003cstrong data-end=\"541\" data-start=\"472\"\u003ehard starting, unstable idle, hesitation, or inconsistent running\u003c\/strong\u003e after regular E20 fuel exposure, a complete OEM-spec carb kit is often a more reliable fix than repeated jet cleaning or local rebuilds.\u003c\/p\u003e\n\u003cp data-end=\"908\" data-start=\"680\"\u003eThis is not a “repair kit” or a random aftermarket carb. It is commonly searched as \u003cstrong data-end=\"855\" data-start=\"764\"\u003e“E20 carb kit,” “E20 carburettor,” “UCE 350 BS3 carb assembly,” “Classic 350 carb BS3,”\u003c\/strong\u003e and \u003cstrong data-end=\"906\" data-start=\"860\"\u003e“Royal Enfield carburetor kit KLT00003\/A.”\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"1064\" data-start=\"910\"\u003e\u003cstrong data-end=\"929\" data-start=\"910\"\u003eBefore you buy:\u003c\/strong\u003e confirm your bike is \u003cstrong data-end=\"985\" data-start=\"951\"\u003eUCE 350 + BS3 + CARB (not EFI)\u003c\/strong\u003e, and match your old carb\/connector\/throttle-cable routing via photo\/VIN check.\u003c\/p\u003e\n\u003cp data-end=\"1102\" data-start=\"1069\"\u003e\u003cstrong data-end=\"1100\" data-start=\"1069\"\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"2002\" data-start=\"1103\"\u003e\n\u003cli data-end=\"1247\" data-start=\"1103\"\u003e\n\u003cp data-end=\"1247\" data-start=\"1105\"\u003eGenuine-spec \u003cstrong data-end=\"1145\" data-start=\"1118\"\u003ecomplete carburetor kit\u003c\/strong\u003e for \u003cstrong data-end=\"1179\" data-start=\"1150\"\u003eUCE 350 BS3 (carb models)\u003c\/strong\u003e (part number search-driven) \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1357\" data-start=\"1248\"\u003e\n\u003cp data-end=\"1357\" data-start=\"1250\"\u003eBuilt for \u003cstrong data-end=\"1295\" data-start=\"1260\"\u003eE20 fuel compatibility use-case\u003c\/strong\u003e (E20 carb kit intent) \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1495\" data-start=\"1358\"\u003e\n\u003cp data-end=\"1495\" data-start=\"1360\"\u003eBest for fixing: \u003cstrong data-end=\"1434\" data-start=\"1377\"\u003ehard starting, rough idle, hesitation, uneven fueling\u003c\/strong\u003e on older BS3 carb bikes (when carb wear is the root cause)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1562\" data-start=\"1496\"\u003e\n\u003cp data-end=\"1562\" data-start=\"1498\"\u003e\u003cstrong data-end=\"1526\" data-start=\"1498\"\u003eDirect replacement style\u003c\/strong\u003e kit (not a jet-only service pack)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1672\" data-start=\"1563\"\u003e\n\u003cp data-end=\"1672\" data-start=\"1565\"\u003e\u003cstrong data-end=\"1592\" data-start=\"1565\"\u003eNot compatible with EFI\u003c\/strong\u003e \/ fuel-injected UCE \u0026amp; all \u003cstrong data-end=\"1631\" data-start=\"1619\"\u003eJ-Series\u003c\/strong\u003e engines (return-prevention constraint)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1786\" data-start=\"1673\"\u003e\n\u003cp data-end=\"1786\" data-start=\"1675\"\u003e\u003cstrong data-end=\"1698\" data-start=\"1675\"\u003eNot for BS4 UCE 350\u003c\/strong\u003e (BS4 uses a different E20 carb kit part number) \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1898\" data-start=\"1787\"\u003e\n\u003cp data-end=\"1898\" data-start=\"1789\"\u003eHelps reduce repeat carb issues compared to frequent cleaning on ethanol fuel (practical ownership benefit)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2002\" data-start=\"1899\"\u003e\n\u003cp data-end=\"2002\" data-start=\"1901\"\u003eRecommended installation by a mechanic; final tune\/idle-mixture may still be required after fitment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(247, 8, 8); text-decoration: underline;\"\u003e\u003cstrong\u003eGET IT INSTALLED ONLY BY PROFESSIONALS \u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"2043\" data-start=\"2007\"\u003e\u003cstrong data-end=\"2041\" data-start=\"2007\"\u003eCompatibility Table (Critical)\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 class=\"w-fit min-w-(--thread-content-width)\" data-end=\"3234\" data-start=\"2045\"\u003e\n\u003cthead data-end=\"2129\" data-start=\"2045\"\u003e\n\u003ctr data-end=\"2129\" data-start=\"2045\"\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2053\" data-start=\"2045\"\u003eModel\u003c\/th\u003e\n\u003cth data-col-size=\"md\" data-end=\"2071\" data-start=\"2053\"\u003ePlatform\/Engine\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2085\" data-start=\"2071\"\u003eBS\/Emission\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2093\" data-start=\"2085\"\u003eYears\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2108\" data-start=\"2093\"\u003eStatus (✅\/❓)\u003c\/th\u003e\n\u003cth data-col-size=\"xl\" data-end=\"2129\" data-start=\"2108\"\u003eNotes\/Constraints\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"3234\" data-start=\"2156\"\u003e\n\u003ctr data-end=\"2488\" data-start=\"2156\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2191\" data-start=\"2156\"\u003eUCE 350 \u003cstrong data-end=\"2174\" data-start=\"2166\"\u003eCarb\u003c\/strong\u003e (engine family)\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"2207\" data-start=\"2191\"\u003e346cc UCE 350\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2217\" data-start=\"2207\"\u003e\u003cstrong data-end=\"2216\" data-start=\"2209\"\u003eBS3\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2236\" data-start=\"2217\"\u003eRegion-dependent\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2240\" data-start=\"2236\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"xl\" data-end=\"2488\" data-start=\"2240\"\u003e\n\u003cstrong data-end=\"2310\" data-start=\"2272\"\u003eE20 CARBURETOR KIT – UCE 350 BS3”\u003c\/strong\u003e under PN \u003cstrong data-end=\"2334\" data-start=\"2320\"\u003eKLT00003\/A\u003c\/strong\u003e\u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2644\" data-start=\"2489\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2516\" data-start=\"2489\"\u003eClassic 350 UCE \u003cstrong data-end=\"2515\" data-start=\"2507\"\u003eCarb\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"2532\" data-start=\"2516\"\u003e346cc UCE 350\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2538\" data-start=\"2532\"\u003eBS3\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2560\" data-start=\"2538\"\u003e~2009–2012 (varies)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2564\" data-start=\"2560\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"xl\" data-end=\"2644\" data-start=\"2564\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2763\" data-start=\"2645\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2671\" data-start=\"2645\"\u003eBullet 350 UCE \u003cstrong data-end=\"2670\" data-start=\"2662\"\u003eCarb\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"2687\" data-start=\"2671\"\u003e346cc UCE 350\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2693\" data-start=\"2687\"\u003eBS3\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2702\" data-start=\"2693\"\u003evaries\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2706\" data-start=\"2702\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"xl\" data-end=\"2763\" data-start=\"2706\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2893\" data-start=\"2764\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2791\" data-start=\"2764\"\u003eElectra 350 UCE \u003cstrong data-end=\"2790\" data-start=\"2782\"\u003eCarb\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"2807\" data-start=\"2791\"\u003e346cc UCE 350\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2813\" data-start=\"2807\"\u003eBS3\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2822\" data-start=\"2813\"\u003evaries\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2826\" data-start=\"2822\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"xl\" data-end=\"2893\" data-start=\"2826\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"3018\" data-start=\"2894\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2925\" data-start=\"2894\"\u003eThunderbird 350 UCE \u003cstrong data-end=\"2924\" data-start=\"2916\"\u003eCarb\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"2941\" data-start=\"2925\"\u003e346cc UCE 350\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2947\" data-start=\"2941\"\u003eBS3\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2956\" data-start=\"2947\"\u003evaries\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2960\" data-start=\"2956\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"xl\" data-end=\"3018\" data-start=\"2960\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"3234\" data-start=\"3019\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3040\" data-start=\"3019\"\u003e\u003cstrong data-end=\"3039\" data-start=\"3021\"\u003eNot compatible\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"3101\" data-start=\"3040\"\u003eAny EFI UCE \/ J-Series \/ 650 Twins \/ Himalayan LS410 \/ 450\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3105\" data-start=\"3101\"\u003e—\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3109\" data-start=\"3105\"\u003e—\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3113\" data-start=\"3109\"\u003e—\u003c\/td\u003e\n\u003ctd data-col-size=\"xl\" data-end=\"3234\" data-start=\"3113\"\u003e\n\u003cstrong data-end=\"3146\" data-start=\"3115\"\u003eNot for fuel-injected bikes\u003c\/strong\u003e. \u003cstrong data-end=\"3174\" data-start=\"3148\"\u003eNot for BS4 carb bikes\u003c\/strong\u003e (different kit PN). \u003cspan data-state=\"closed\" class=\"\"\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\u003cp data-start=\"2890\" data-end=\"2917\"\u003e\u003cstrong data-start=\"2890\" data-end=\"2902\"\u003eVariants\u003c\/strong\u003e\u003cbr data-start=\"2902\" data-end=\"2905\"\u003e\u003ca href=\"https:\/\/underthehood.co.in\/products\/royal-enfield-rlt00241a-e20-carburettor-bs29-uce-350-bs3?_pos=3\u0026amp;_sid=076842fdb\u0026amp;_ss=r\"\u003e\u003cstrong\u003eTO BUY E20 BS3 CARBURETOR CLICK HERE\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-start=\"2890\" data-end=\"2917\"\u003e\u003ca href=\"https:\/\/underthehood.co.in\/products\/royal-enfield-rlt00240a-dual-fuel-e20-e10-carburettor-classic-standard-electra-350-bs4?_pos=5\u0026amp;_sid=076842fdb\u0026amp;_ss=r\"\u003e\u003cstrong\u003eTO BUY E20 BS4 CARBURETOR CLICK HERE\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-start=\"2890\" data-end=\"2917\"\u003e\u003ca href=\"https:\/\/underthehood.co.in\/products\/royal-enfield-e20-carburetor-kit-uce-350-bs4-klt00004-a?_pos=3\u0026amp;_sid=cc0cf57e2\u0026amp;_ss=r\"\u003e\u003cstrong\u003eTO BUY E20 BS4 CARBURETOR KIT CLICK HERE\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-end=\"3293\" data-start=\"3271\"\u003e\u003cstrong data-end=\"3291\" data-start=\"3271\"\u003eFAQs \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"3580\" data-start=\"3295\"\u003e\u003cstrong data-end=\"3352\" data-start=\"3295\"\u003eQ1 (Fitment): How do I confirm this will fit my bike?\u003c\/strong\u003e\u003cbr data-end=\"3355\" data-start=\"3352\"\u003eCheck 3 things: \u003cstrong data-end=\"3409\" data-start=\"3371\"\u003e(1) Engine family: UCE 350 (346cc)\u003c\/strong\u003e, \u003cstrong data-end=\"3432\" data-start=\"3411\"\u003e(2) Emission: BS3\u003c\/strong\u003e, \u003cstrong data-end=\"3475\" data-start=\"3434\"\u003e(3) Fuel system: Carburetor (not EFI)\u003c\/strong\u003e. Best method: share \u003cstrong data-end=\"3579\" data-start=\"3496\"\u003eVIN\/RC + a clear photo of your existing carb + throttle cable routing\/connector\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-end=\"3878\" data-start=\"3582\"\u003e\u003cstrong data-end=\"3667\" data-start=\"3582\"\u003eQ2 (Fitment): Will this fit Classic 350 \/ Bullet 350 \/ Electra \/ Thunderbird 350?\u003c\/strong\u003e\u003cbr data-end=\"3670\" data-start=\"3667\"\u003eOnly if your specific motorcycle is \u003cstrong data-end=\"3730\" data-start=\"3706\"\u003eUCE 350 + BS3 + carb\u003c\/strong\u003e. \u003cstrong\u003eIt fits all UCE BS3 CARBURETOR.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"4392\" data-start=\"3880\"\u003e\u003cstrong data-end=\"3973\" data-start=\"3880\"\u003eQ3 (Comparison): Why buy an OEM-spec kit vs an aftermarket carb from Amazon\/local market?\u003c\/strong\u003e\u003cbr data-end=\"3976\" data-start=\"3973\"\u003eGeneric carbs often have \u003cstrong data-end=\"4066\" data-start=\"4001\"\u003einconsistent calibration\/jetting and variable casting quality\u003c\/strong\u003e, causing repeat issues. An OEM-spec kit is typically chosen for \u003cstrong data-end=\"4169\" data-start=\"4131\"\u003epredictable tuning and reliability\u003c\/strong\u003e, especially when switching to ethanol-blended fuel usage patterns. (Also reduces “trial-and-error” installs.) See how generic listings often lump multiple models without BS\/EFI checks. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"4709\" data-start=\"4394\"\u003e\u003cstrong data-end=\"4468\" data-start=\"4394\"\u003eQ4 (Installation): Is it plug-and-play? What should my mechanic check?\u003c\/strong\u003e\u003cbr data-end=\"4471\" data-start=\"4468\"\u003eIt’s a replacement-style kit, but the mechanic should: \u003cstrong data-end=\"4605\" data-start=\"4526\"\u003einspect intake manifold boot, vacuum lines, fuel filter, throttle free-play\u003c\/strong\u003e, and set \u003cstrong data-end=\"4637\" data-start=\"4615\"\u003eidle speed\/mixture\u003c\/strong\u003e after installation. Use a new clamp\/boot if cracked to avoid air leaks.\u003c\/p\u003e\n\u003cp data-end=\"4963\" data-start=\"4711\"\u003e\u003cstrong data-end=\"4760\" data-start=\"4711\"\u003eQ5 (Symptoms): What problems does this solve?\u003c\/strong\u003e\u003cbr data-end=\"4763\" data-start=\"4760\"\u003eCommon carb-related symptoms: \u003cstrong data-end=\"4898\" data-start=\"4793\"\u003ehard starting, stalling at idle, flat spots on throttle, erratic fueling, poor response after warm-up\u003c\/strong\u003e, especially if the carb has wear or ethanol-related degradation.\u003c\/p\u003e\n\u003cp data-end=\"5359\" data-start=\"4965\"\u003e\u003cstrong data-end=\"5045\" data-start=\"4965\"\u003eQ6 (Return-prevention): What photo should I send to confirm before ordering?\u003c\/strong\u003e\u003cbr data-end=\"5048\" data-start=\"5045\"\u003eSend: (1) \u003cstrong data-end=\"5097\" data-start=\"5058\"\u003eFull carb photo (left + right side)\u003c\/strong\u003e, (2) \u003cstrong data-end=\"5141\" data-start=\"5103\"\u003etop view showing throttle cable(s)\u003c\/strong\u003e, (3) \u003cstrong data-end=\"5173\" data-start=\"5147\"\u003eintake side connection\u003c\/strong\u003e, (4) your \u003cstrong data-end=\"5211\" data-start=\"5184\"\u003eRC page showing BS3\/BS4\u003c\/strong\u003e, or \u003cstrong data-end=\"5223\" data-start=\"5216\"\u003eVIN\u003c\/strong\u003e. If your bike is \u003cstrong data-end=\"5253\" data-start=\"5241\"\u003eBS4 carb\u003c\/strong\u003e, do not order this—BS4 uses a different E20 carb kit part number.\u003c\/p\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":50827691393319,"sku":null,"price":1690.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/KLT00003_A_E20_Carb_Kit_Royal_Enfield_UCE_350_BS3_Carb.jpg?v=1768415157","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-klt00003-e20-carburetor-kit-uce-350-bs3","provider":"UNDER THE HOOD","version":"1.0","type":"link"}