{"product_id":"royal-enfield-thunderbird-500-classic-500-efi-himalayan-411-bs4-pulse-air-valve-510187-b","title":"Royal Enfield Thunderbird 500, Classic 500 EFI \u0026 Himalayan 411 BS4 Pulse Air Valve (PAV) – 510187\/B – Genuine OEM","description":"\u003ch1\u003eRoyal Enfield Thunderbird 500, Classic 500 EFI \u0026amp; Himalayan 411 BS4 Pulse Air Valve (PAV \/ Secondary Air Valve) – 510187\/B\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eGenuine Royal Enfield Pulse Air Valve (PAV) for specific older Royal Enfield secondary-air \/ emission-control systems.\u003c\/strong\u003e The current genuine service part number is \u003cstrong\u003e510187\/B\u003c\/strong\u003e. Royal Enfield’s factory description is \u003cstrong\u003ePULSE AIR VALVE (TCI)\u003c\/strong\u003e; model-specific catalogues also use \u003cstrong\u003ePulse Air Valve - Ucal\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eBuyer terms include \u003cstrong\u003ePAV valve, secondary air valve, secondary air injection valve, air injection valve, emission-control valve and air suction valve\u003c\/strong\u003e. It is \u003cstrong\u003enot an EVAP purge valve, not a fuel valve and not an inlet\/exhaust valve inside the engine\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eQuick Buyer Check\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent SKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e510187\/B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOlder Ref.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e510187\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFactory Description\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePULSE AIR VALVE (TCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfirmed Core Applications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThunderbird 500 EFI, Rumbler 500, Classic 500 EFI, Himalayan 411 \/ LS410 BS4-Euro 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 valve unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSecondary-air \/ emission-control system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat Does 510187\/B Do?\u003c\/h2\u003e\n\u003cp\u003eThe Pulse Air Valve forms part of Royal Enfield’s secondary-air emission-control system. It works with model-specific hoses, adaptors, clips and cylinder-head\/exhaust-side plumbing to control fresh-air flow into the exhaust-side circuit as designed by the factory.\u003c\/p\u003e\n\u003ch2\u003ePart Number \/ Supersession\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003cth\u003eStatus\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e510187\/A\u003c\/td\u003e\n\u003ctd\u003ePulse Air Valve (TCI)\u003c\/td\u003e\n\u003ctd\u003eOlder genuine reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e510187\/B\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePulse Air Valve (TCI)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent replacement\/service reference\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eCurrent genuine-parts databases explicitly route 510187\/A to 510187\/B.\u003c\/p\u003e\n\u003ch2\u003eConfirmed Compatibility\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003cth\u003eStatus\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThunderbird 500\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e500 EFI \/ applicable PAV system\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eConfirmed\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRumbler 500\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExport-market 500 EFI\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eConfirmed\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClassic 500 EFI\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApplicable early UCE 500 EFI PAV layout\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eConfirmed\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHimalayan 411 \/ LS410\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBS4 \/ Euro 4 PAV-equipped configuration\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eConfirmed\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCritical Thunderbird 350 Correction\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDo not list Thunderbird 350 or Thunderbird X 350 as confirmed fitment.\u003c\/strong\u003e Thunderbird 350 and 500 appear together in a combined catalogue, but the generation uses different 350-TCI and 500-EFI arrangements. Text extraction can lose blank model columns and make a 500-only part look common to both. This listing therefore keeps Thunderbird 350 out unless an exact VIN\/EPC or removed genuine part specifically confirms 510187\/B.\u003c\/p\u003e\n\u003ch2\u003eClassic 350 – Explicit Exclusion\u003c\/h2\u003e\n\u003cp\u003eThe checked Classic 350\/500 catalogue shows \u003cstrong\u003e510187 under the 500 EFI column and NA under 350CC\u003c\/strong\u003e. Classic 350 UCE is therefore not claimed.\u003c\/p\u003e\n\u003ch2\u003eHimalayan 411 Fitment\u003c\/h2\u003e\n\u003cp\u003eThe Himalayan BS4 \/ Euro 4 parts catalogue directly lists \u003cstrong\u003e510187\/B – Pulse Air Valve – Qty 1\u003c\/strong\u003e. This supports Himalayan LS410 \/ 411cc BS4-Euro 4. Do not automatically extend this to Himalayan 411 BS6 \/ Euro 5 or Scram 411.\u003c\/p\u003e\n\u003ch2\u003eBullet 500 – Verify Before Ordering\u003c\/h2\u003e\n\u003cp\u003eSome current sellers cross-list 510187\/B in Bullet 500 categories, but Royal Enfield used different PAV service families across production periods. Do not advertise universal Bullet 500 fitment; verify the old part or VIN\/EPC.\u003c\/p\u003e\n\u003ch2\u003eSimilar \/ Related Parts\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003cth\u003eDifference\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e510187\/B\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePulse Air Valve (TCI)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eThis product\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e510188\/F\u003c\/td\u003e\n\u003ctd\u003eBracket - PAV\u003c\/td\u003e\n\u003ctd\u003eSeparate mounting bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e510189\/G\u003c\/td\u003e\n\u003ctd\u003eHose - PAV, Synthetic Rubber\u003c\/td\u003e\n\u003ctd\u003eSeparate PAV hose\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e510190\/C\u003c\/td\u003e\n\u003ctd\u003eNylon Tube - PAV Wire\u003c\/td\u003e\n\u003ctd\u003eSeparate PAV tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e510191\/D\u003c\/td\u003e\n\u003ctd\u003eBreather Pipe 16 × 10 × 800\u003c\/td\u003e\n\u003ctd\u003eRelated hose\/pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e147504\/A\u003c\/td\u003e\n\u003ctd\u003eBush - PAV\u003c\/td\u003e\n\u003ctd\u003eSeparate mounting bush\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e147502\/A\u003c\/td\u003e\n\u003ctd\u003eGrommet - PAV\u003c\/td\u003e\n\u003ctd\u003eSeparate grommet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e573984\/A\u003c\/td\u003e\n\u003ctd\u003ePAV Hose - Air Filter\u003c\/td\u003e\n\u003ctd\u003eSeparate hose\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e573985\/A\u003c\/td\u003e\n\u003ctd\u003ePAV Tube Adaptor\u003c\/td\u003e\n\u003ctd\u003eSeparate adaptor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e582663\/A\u003c\/td\u003e\n\u003ctd\u003eLater PAV mounting\/service family on selected UCE applications\u003c\/td\u003e\n\u003ctd\u003eDo not substitute without EPC confirmation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e888192\u003c\/td\u003e\n\u003ctd\u003eAdaptor with PAV Connection \u0026amp; O-Ring Kit\u003c\/td\u003e\n\u003ctd\u003eAdaptor service kit, not the valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePAV vs EVAP\u003c\/h2\u003e\n\u003cp\u003ePAV \/ secondary-air and EVAP \/ fuel-vapour control are different systems. Do not confuse 510187\/B with an EVAP purge valve, charcoal canister, fuel-vapour hose, injector, throttle body or carburettor air-cut valve.\u003c\/p\u003e\n\u003ch2\u003ePossible Symptoms\u003c\/h2\u003e\n\u003cp\u003eA PAV-system problem may involve cracked hoses, damaged valve ports, loose plumbing, broken mounting or abnormal air leakage. \u003cstrong\u003eDeceleration popping alone does not prove the valve is faulty\u003c\/strong\u003e; exhaust leaks, fuelling, ignition, valve condition and hose leaks can cause similar symptoms.\u003c\/p\u003e\n\u003ch2\u003eInspect Before Replacing\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAir-filter-to-PAV hose\u003c\/li\u003e\n\u003cli\u003eBraided PAV hose\u003c\/li\u003e\n\u003cli\u003ePAV adaptor hose \/ cylinder-head-side plumbing\u003c\/li\u003e\n\u003cli\u003eHose clips and clamps\u003c\/li\u003e\n\u003cli\u003ePAV bracket\u003c\/li\u003e\n\u003cli\u003eBushes and grommets\u003c\/li\u003e\n\u003cli\u003eRelated sealing points\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhen Should It Be Replaced?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eValve body or hose port is cracked.\u003c\/li\u003e\n\u003cli\u003eMounting section is damaged.\u003c\/li\u003e\n\u003cli\u003eInternal valve function is confirmed faulty after diagnosis.\u003c\/li\u003e\n\u003cli\u003eOriginal unit is missing.\u003c\/li\u003e\n\u003cli\u003eFactory restoration requires the original PAV system.\u003c\/li\u003e\n\u003cli\u003eExact EPC or removed part confirms 510187\/B or older 510187\/A.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat You Receive\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1 × Genuine Royal Enfield Pulse Air Valve \/ PAV Unit – 510187\/B.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eNot Included Unless Physically Supplied\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePAV bracket\u003c\/li\u003e\n\u003cli\u003eHoses\u003c\/li\u003e\n\u003cli\u003eClips \/ clamps\u003c\/li\u003e\n\u003cli\u003eBushes\u003c\/li\u003e\n\u003cli\u003eGrommets\u003c\/li\u003e\n\u003cli\u003eAdaptor\u003c\/li\u003e\n\u003cli\u003eO-rings \/ seals\u003c\/li\u003e\n\u003cli\u003eMounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm 510187\/B and exact motorcycle application before opening.\u003c\/li\u003e\n\u003cli\u003eAllow engine\/exhaust area to cool.\u003c\/li\u003e\n\u003cli\u003ePhotograph original hose routing before removal.\u003c\/li\u003e\n\u003cli\u003eInspect all hoses for cracking and hardening.\u003c\/li\u003e\n\u003cli\u003eConnect every hose to the correct PAV port.\u003c\/li\u003e\n\u003cli\u003eKeep hoses clear of hot and moving parts.\u003c\/li\u003e\n\u003cli\u003eCheck for abnormal air\/exhaust leakage after installation.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended where the system has been modified or deleted.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot Confirmed \/ Do Not Order by Model Name Alone\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eStatus\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eThunderbird 350 \/ Thunderbird X 350\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eNot claimed\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClassic 350 UCE\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eNot compatible in checked catalogue\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBullet 500 UCE\u003c\/td\u003e\n\u003ctd\u003eVerify exact VIN\/EPC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHimalayan 411 BS6 \/ Euro 5\u003c\/td\u003e\n\u003ctd\u003eNot confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScram 411\u003c\/td\u003e\n\u003ctd\u003eNot confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClassic 350 Reborn, New Bullet 350, Meteor 350, Hunter 350, Goan Classic 350\u003c\/td\u003e\n\u003ctd\u003eDo not order by assumption\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHimalayan 450, Guerrilla 450, Scram 440\u003c\/td\u003e\n\u003ctd\u003eDifferent platform\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterceptor 650, GT 650, Super Meteor 650, Shotgun 650, Bear 650, Classic 650\u003c\/td\u003e\n\u003ctd\u003eSeparate 650-platform EPC required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePrice Note\u003c\/h2\u003e\n\u003cp\u003eCurrent Indian exact-SKU specialist listings checked for 510187\/B show \u003cstrong\u003e₹1,102\u003c\/strong\u003e. An older 2024 price list showed ₹1,146; the listing uses the current ₹1,102 retail reference rather than the older value.\u003c\/p\u003e\n\u003ch2\u003eOrdering \u0026amp; Return Note\u003c\/h2\u003e\n\u003cp\u003eVerify part number, exact model, emission generation and existing PAV arrangement before opening or installation. Correctly supplied spare parts are not returnable for incorrect selection, wrong diagnosis, mechanic recommendation, fitment mismatch or change of mind. Wrong\/damaged\/missing-item claims require the applicable complete unboxing video within the stated claim window.\u003c\/p\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is 510187\/B?\u003c\/strong\u003e\u003cbr\u003eGenuine Royal Enfield Pulse Air Valve (PAV \/ TCI), an external secondary-air emission-control valve.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit Thunderbird 500?\u003c\/strong\u003e\u003cbr\u003eYes, on the applicable 500 EFI PAV system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit Thunderbird 350?\u003c\/strong\u003e\u003cbr\u003eNot claimed. Verify exact VIN\/EPC if an older motorcycle appears to use the same number.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit Classic 500 EFI?\u003c\/strong\u003e\u003cbr\u003eYes, where the 510187 PAV arrangement is specified.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit Classic 350 UCE?\u003c\/strong\u003e\u003cbr\u003eNo fitment is claimed; the checked factory catalogue marks the 350cc application NA.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit Himalayan 411?\u003c\/strong\u003e\u003cbr\u003eYes for the directly documented LS410 \/ 411cc BS4-Euro 4 PAV configuration. Do not automatically extend to BS6.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit Rumbler 500?\u003c\/strong\u003e\u003cbr\u003eYes. The Rumbler 500 catalogue directly lists 510187\/B.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre hoses included?\u003c\/strong\u003e\u003cbr\u003eDo not assume so; hoses, bracket, bushes, grommets and adaptors are separately catalogued unless physically supplied.\u003c\/p\u003e\n\u003cp\u003eRoyal Enfield 510187\/B, 510187B, 510187, 510187\/A, PAV valve, pulse air valve, secondary air valve, secondary air injection valve, air injection valve, Thunderbird 500 PAV, Rumbler 500 PAV, Classic 500 EFI PAV, Himalayan 411 BS4 PAV, Himalayan LS410 pulse air valve, TCI pulse air valve, Royal Enfield emission valve.\u003c\/p\u003e","brand":"Royal Enfield","offers":[{"title":"Default Title","offer_id":52384019841319,"sku":"510187\/B","price":1102.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/510187_Pulse_air_value_1.png?v=1792519680","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-thunderbird-500-classic-500-efi-himalayan-411-bs4-pulse-air-valve-510187-b","provider":"UNDER THE HOOD","version":"1.0","type":"link"}