{"product_id":"royal-enfield-570840-a-pilot-jet-bs29-carburetor","title":"Royal Enfield Pilot Jet for BS29 Carburetor – 570840\/A","description":"\u003ch2\u003eRoyal Enfield Pilot Jet for BS29 Carburetor – 570840\/A\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003e570840\/A\u003c\/strong\u003e is a genuine Royal Enfield \u003cstrong\u003ePilot Jet\u003c\/strong\u003e. Public Royal Enfield fiche-style sources, OEM-style seller pages, and parts-list indexes consistently identify this part number as \u003cstrong\u003ePILOT JET\u003c\/strong\u003e. The surrounding carburetor hardware sequence in Royal Enfield parts indexes places it directly with \u003cstrong\u003emain jet\u003c\/strong\u003e, \u003cstrong\u003epilot air jet\u003c\/strong\u003e, \u003cstrong\u003ejet holder\u003c\/strong\u003e, and related carburetor tuning parts, which strongly confirms that this is a carburetor idle\/low-speed fuel metering jet rather than a generic fastener or engine hardware item.\u003c\/p\u003e\u003cp\u003eThis is the right part for carbureted Royal Enfield owners dealing with rough idle, poor cold starting, hesitation just off idle, unstable low-speed running, or carburetor service where the pilot circuit needs correct OEM jetting. Buyers also search for this as \u003cstrong\u003eRoyal Enfield pilot jet\u003c\/strong\u003e, \u003cstrong\u003eBS29 pilot jet\u003c\/strong\u003e, \u003cstrong\u003eBullet 350 carburetor pilot jet\u003c\/strong\u003e, \u003cstrong\u003eidle jet Royal Enfield\u003c\/strong\u003e, and \u003cstrong\u003ecarb pilot jet RE\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore you buy:\u003c\/strong\u003e this is best sold as a \u003cstrong\u003eBS29 carburetor pilot jet\u003c\/strong\u003e with supported older carb\/early-UCE market fitment references. Match the old jet, carburetor type, and part number before ordering. Do not buy it for EFI motorcycles or newer fuel-injected platforms.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGenuine Royal Enfield OEM pilot jet\u003c\/li\u003e\n\u003cli\u003ePart number: 570840\/A\u003c\/li\u003e\n\u003cli\u003eOfficial description: Pilot Jet\u003c\/li\u003e\n\u003cli\u003ePart of the carburetor idle \/ low-speed fuel circuit\u003c\/li\u003e\n\u003cli\u003eLocated in the BS29 carburetor jet family with pilot air jet, main jet, and jet holder references\u003c\/li\u003e\n\u003cli\u003eUseful during carburetor servicing, idle tuning, and jet replacement work\u003c\/li\u003e\n\u003cli\u003eRelevant for rough idle, poor off-idle response, or blocked\/worn jet replacement\u003c\/li\u003e\n\u003cli\u003eBest ordered by exact part number and carburetor match\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility Table\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel \/ Application\u003c\/th\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003cth\u003eStatus\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOlder carbureted Royal Enfield models using BS29 carburetor\u003c\/td\u003e\n\u003ctd\u003eCarburetor-based RE platform\u003c\/td\u003e\n\u003ctd\u003eConfirmed at part-family level\u003c\/td\u003e\n\u003ctd\u003eRoyal Enfield parts indexes place 570840\/A in the BS29 carburetor jet family.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTBTS, Bullet 350 UCE KS\/ES, Electra 350 UCE ES, Classic 350, Thunderbird 350, Machismo A500 (2009)\u003c\/td\u003e\n\u003ctd\u003eOlder UCE \/ carb and related seller-listed models\u003c\/td\u003e\n\u003ctd\u003eConfirmed in seller references\u003c\/td\u003e\n\u003ctd\u003eSeller references list these models against 570840\/A.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEFI motorcycles \/ newer fuel-injected Royal Enfield models\u003c\/td\u003e\n\u003ctd\u003eEFI \/ FI platforms\u003c\/td\u003e\n\u003ctd\u003eNot compatible \/ not safely listable\u003c\/td\u003e\n\u003ctd\u003ePilot jet is a carburetor jet and should not be sold for EFI motorcycles without a carb conversion context.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eVariants\u003c\/h3\u003e\u003cp\u003eNo variants under this SKU. Related nearby carburetor parts in Royal Enfield parts indexes include \u003cstrong\u003e570837\/A Main Jet\u003c\/strong\u003e, \u003cstrong\u003e570838\/A Jet Holder\u003c\/strong\u003e, and \u003cstrong\u003e570839\/A Pilot Air Jet\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eBefore You Buy Checklist\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConfirm your bike uses the BS29 carburetor or matching carburetor application\u003c\/li\u003e\n\u003cli\u003eMatch the old jet and part number before ordering\u003c\/li\u003e\n\u003cli\u003eDo not order this for EFI motorcycles\u003c\/li\u003e\n\u003cli\u003eCheck whether your service job needs pilot jet only or a wider carb rebuild kit\u003c\/li\u003e\n\u003cli\u003eUse part number + carburetor family + old-part match as the safest buying method\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003e1) What is 570840\/A?\u003c\/strong\u003e\u003cbr\u003eIt is the genuine Royal Enfield Pilot Jet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e2) What does a pilot jet do?\u003c\/strong\u003e\u003cbr\u003eIt meters fuel in the carburetor’s low-speed \/ idle circuit, which affects idle quality and off-idle response.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e3) Is this for EFI bikes?\u003c\/strong\u003e\u003cbr\u003eNo. A pilot jet is a carburetor part and should not be bought for standard EFI motorcycles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e4) Which bikes are commonly linked to it?\u003c\/strong\u003e\u003cbr\u003eSeller references connect it to older carbureted \/ early-UCE Royal Enfield models such as TBTS, Bullet 350 UCE KS\/ES, Electra 350 UCE ES, Classic 350, and Thunderbird 350.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e5) OEM or aftermarket?\u003c\/strong\u003e\u003cbr\u003eThis is a genuine Royal Enfield OEM part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6) What symptoms can point toward pilot jet problems?\u003c\/strong\u003e\u003cbr\u003eBlocked or incorrect pilot jets can contribute to rough idle, hesitation just off idle, and poor low-speed running.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e7) What should I check before ordering?\u003c\/strong\u003e\u003cbr\u003eCheck the carburetor type, old jet, exact part number, and whether the motorcycle is carbureted rather than fuel injected.\u003c\/p\u003e\u003ch3\u003eAlso Searched As\u003c\/h3\u003e\u003cp\u003eRoyal Enfield pilot jet, BS29 pilot jet, Bullet 350 carb pilot jet, idle jet Royal Enfield, carburetor low-speed jet RE, pilot carb jet 570840\/A.\u003c\/p\u003e","brand":"Royal Enfield","offers":[{"title":"Default Title","offer_id":51331940745511,"sku":"570840\/A","price":95.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/Royal_Enfield_Pilot_Jet_for_BS29_Carburetor_570840_A.jpg?v=1777113586","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-570840-a-pilot-jet-bs29-carburetor","provider":"UNDER THE HOOD","version":"1.0","type":"link"}