{"product_id":"hero-xtreme-125r-cylinder-kit-k12121acla000s","title":"Hero Xtreme 125R Cylinder Kit | Genuine Block Piston Bore Kit | K12121ACLA000S","description":"\u003ch2\u003eHero Xtreme 125R Cylinder Kit – K12121ACLA000S\u003c\/h2\u003e\n\u003cp\u003eRebuild a worn or damaged engine cylinder section with the \u003cstrong\u003eHero Genuine Cylinder Kit K12121ACLA000S\u003c\/strong\u003e. This exact Hero kit is best supported for the \u003cstrong\u003eHero Xtreme 125R \/ Xtreme 125\u003c\/strong\u003e engine application where this part number is confirmed through the Hero EPC, original packet, VIN record, or existing component.\u003c\/p\u003e\n\u003cp\u003eThis product is commonly searched as \u003cstrong\u003eXtreme 125R cylinder kit, Hero Xtreme 125 block piston kit, Xtreme 125R bore kit, Hero 125cc cylinder piston kit, engine block piston assembly, cylinder standard kit, and K12121ACLA000S\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat This Product Is\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHero Genuine engine cylinder kit\u003c\/li\u003e\n\u003cli\u003eProduct description: \u003cstrong\u003eCYLINDER KIT\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePart number \/ MPN: \u003cstrong\u003eK12121ACLA000S\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCommon market name: Cylinder kit \/ block piston kit \/ bore kit\u003c\/li\u003e\n\u003cli\u003eApplication area: Engine cylinder and piston section\u003c\/li\u003e\n\u003cli\u003eBest-supported model family: \u003cstrong\u003eHero Xtreme 125R \/ Xtreme 125\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Hero MotoCorp engine-rebuild kit\u003c\/li\u003e\n\u003cli\u003eExact replacement where \u003cstrong\u003eK12121ACLA000S\u003c\/strong\u003e is specified\u003c\/li\u003e\n\u003cli\u003eSuitable for diagnosed cylinder wear, compression loss, piston or cylinder damage, excessive engine smoke, oil consumption, or piston slap\u003c\/li\u003e\n\u003cli\u003eHelps restore compression and combustion when the remaining engine components are serviceable\u003c\/li\u003e\n\u003cli\u003eExact-SKU selection offers better fitment accuracy than choosing a generic 125cc bore kit only by engine capacity\u003c\/li\u003e\n\u003cli\u003eCurrent exact-SKU seller price reference: \u003cstrong\u003e₹3,350\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"panel-heading\"\u003e\n\u003cdiv class=\"panel-title\" id=\"panel-heading\"\u003e\n\u003ch4 class=\"modal-title\"\u003e\n\u003cspan class=\"bhutranslate\"\u003eParts List for\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\"\u003cspan class=\"partNoID\"\u003eK12121ACLA000S\u003c\/span\u003e\"\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tableinside\"\u003e\n\u003cdiv id=\"tableForPartsList_wrapper\" class=\"dataTables_wrapper form-inline dt-bootstrap no-footer\"\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-12\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"col-sm-12\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-sm-12\"\u003e\n\u003ctable class=\"table table-bordered dataTable no-footer\" id=\"tableForPartsList\" role=\"grid\"\u003e\n\u003cthead\u003e\n\u003ctr role=\"row\"\u003e\n\u003cth class=\"bhutranslate sorting_asc\" rowspan=\"1\" colspan=\"1\" tabindex=\"0\"\u003eS.No\u003c\/th\u003e\n\u003cth class=\"bhutranslate sorting\" rowspan=\"1\" colspan=\"1\" tabindex=\"0\"\u003ePart No\u003c\/th\u003e\n\u003cth class=\"bhutranslate sorting\" rowspan=\"1\" colspan=\"1\" tabindex=\"0\"\u003eDescription\u003c\/th\u003e\n\u003cth class=\"bhutranslate sorting\" rowspan=\"1\" colspan=\"1\" tabindex=\"0\"\u003eQty\u003c\/th\u003e\n\u003cth class=\"bhutranslate sorting\" rowspan=\"1\" colspan=\"1\" tabindex=\"0\"\u003ePart Image\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody id=\"partsListIDD\"\u003e\n\u003ctr role=\"row\" class=\"odd\"\u003e\n\u003cth class=\"sorting_1\"\u003e1\u003c\/th\u003e\n\u003ctd\u003e\u003ca\u003e12100-AAN-B00\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eCYLINDER COMP.\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cimg class=\"part-image\" src=\"https:\/\/ecatalogue.heromotocorp.biz\/sol_dealer\/dealer\/ecat_print\/part_image\/12100-AAN-B00.jpg\" width=\"50px\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\" class=\"even\"\u003e\n\u003cth class=\"sorting_1\"\u003e2\u003c\/th\u003e\n\u003ctd\u003e\u003ca\u003e12191-AAN-B0099\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGASKET, CYLINDER\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cimg class=\"part-image\" src=\"https:\/\/ecatalogue.heromotocorp.biz\/sol_dealer\/dealer\/ecat_print\/part_image\/12191-AAN-B0099.jpg\" width=\"50px\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\" class=\"odd\"\u003e\n\u003cth class=\"sorting_1\"\u003e3\u003c\/th\u003e\n\u003ctd\u003e\u003ca\u003e12251-AAN-B01\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGASKET, CYLINDER HEAD\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cimg class=\"part-image\" src=\"https:\/\/ecatalogue.heromotocorp.biz\/sol_dealer\/dealer\/ecat_print\/part_image\/12251-AAN-B01.jpg\" width=\"50px\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\" class=\"even\"\u003e\n\u003cth class=\"sorting_1\"\u003e4\u003c\/th\u003e\n\u003ctd\u003e\u003ca\u003e12391-AAN-B01\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGASKET, HEAD COVER\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cimg class=\"part-image\" src=\"https:\/\/ecatalogue.heromotocorp.biz\/sol_dealer\/dealer\/ecat_print\/part_image\/12391-AAN-B01.jpg\" width=\"50px\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\" class=\"odd\"\u003e\n\u003cth class=\"sorting_1\"\u003e5\u003c\/th\u003e\n\u003ctd\u003e\u003ca\u003e13111-AAN-B00\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003ePIN, PISTON\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cimg class=\"part-image\" src=\"https:\/\/ecatalogue.heromotocorp.biz\/sol_dealer\/dealer\/ecat_print\/part_image\/13111-AAN-B00.jpg\" width=\"50px\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\" class=\"even\"\u003e\n\u003cth class=\"sorting_1\"\u003e6\u003c\/th\u003e\n\u003ctd\u003e\u003ca\u003e13101-AAN-B0099\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003ePISTON\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cimg class=\"part-image\" src=\"https:\/\/ecatalogue.heromotocorp.biz\/sol_dealer\/dealer\/ecat_print\/part_image\/13101-AAN-B0099.jpg\" width=\"50px\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\" class=\"odd\"\u003e\n\u003cth class=\"sorting_1\"\u003e7\u003c\/th\u003e\n\u003ctd\u003e\u003ca\u003e13115-001-000\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eCLIP, PISTON PIN\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cimg class=\"part-image\" src=\"https:\/\/ecatalogue.heromotocorp.biz\/sol_dealer\/dealer\/ecat_print\/part_image\/13115-001-000.jpg\" width=\"50px\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\" class=\"even\"\u003e\n\u003cth class=\"sorting_1\"\u003e8\u003c\/th\u003e\n\u003ctd\u003e\u003ca\u003eACLAE0E001000G\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eRING SET PISTON STD\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003cimg class=\"part-image\" src=\"https:\/\/ecatalogue.heromotocorp.biz\/sol_dealer\/dealer\/ecat_print\/part_image\/ACLAE0E001000G.jpg\" width=\"50px\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eConfirmed \/ Best-Supported Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHero Xtreme 125R \/ Xtreme 125\u003c\/strong\u003e where \u003cstrong\u003eK12121ACLA000S\u003c\/strong\u003e is specified in the Hero EPC or on the original packet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHero Xtreme 125R OBD-II catalogues show the corresponding 125cc engine cylinder and cylinder-head assembly family, but the exact kit number should still be verified for the motorcycle's manufacturing month and variant before ordering.\u003c\/p\u003e\n\u003ch3\u003eCompatibility Not Automatically Claimed\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHero Glamour or Glamour XTEC\u003c\/li\u003e\n\u003cli\u003eHero Super Splendor\u003c\/li\u003e\n\u003cli\u003eHero Xtreme 160R\u003c\/li\u003e\n\u003cli\u003eHero Xtreme 200R \/ Xtreme 200S\u003c\/li\u003e\n\u003cli\u003eHero Hunk or Ignitor export variants\u003c\/li\u003e\n\u003cli\u003eAny other Hero 125cc motorcycle without direct part-number confirmation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment Note \/ Return Prevention Note\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, match \u003cstrong\u003eK12121ACLA000S\u003c\/strong\u003e with the old packet, existing kit, Hero EPC, or VIN record. Also verify:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMotorcycle model and manufacturing year\u003c\/li\u003e\n\u003cli\u003eStandard or OBD-II generation\u003c\/li\u003e\n\u003cli\u003eEngine family and engine number\u003c\/li\u003e\n\u003cli\u003eExisting cylinder and piston specification\u003c\/li\u003e\n\u003cli\u003eOil-passage and mounting design\u003c\/li\u003e\n\u003cli\u003eGasket arrangement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDo not order only by engine capacity or visual similarity. Hero uses multiple cylinder-kit revisions across its 125cc motorcycle range.\u003c\/p\u003e\n\u003ch3\u003eSimilar Part Numbers – Do Not Mix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eK12121AANNB01S\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eK12121AANNB02S\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eK12121ACRA001S\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eK12121ACKA000S\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eOther K12121-series Hero cylinder kits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe suffix is significant. Similar-looking kits can differ by cylinder design, piston specification, engine revision, emission generation, gasket combination, or model application.\u003c\/p\u003e\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cp\u003eThis product is identified as a \u003cstrong\u003eCYLINDER KIT\u003c\/strong\u003e. A reliable public exact-SKU bill of materials for \u003cstrong\u003eK12121ACLA000S\u003c\/strong\u003e is not available. Only the components physically supplied inside the sealed Hero package should be represented as included.\u003c\/p\u003e\n\u003cp\u003eDo not automatically promise the piston, piston rings, piston pin, clips, cylinder gasket, or cylinder-head gasket until the actual sealed package has been checked.\u003c\/p\u003e\n\u003ch3\u003eWhat You Will Receive\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × Hero Genuine Cylinder Kit\u003c\/li\u003e\n\u003cli\u003ePart number: \u003cstrong\u003eK12121ACLA000S\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOnly the components physically included inside the sealed Hero package\u003c\/li\u003e\n\u003cli\u003eCylinder head, valves, camshaft, crankshaft, connecting rod, timing-chain components, engine oil, labour, and unrelated overhaul parts are not included unless physically packed and explicitly stated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Details\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHero MotoCorp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number \/ MPN\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eK12121ACLA000S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCYLINDER KIT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommon Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCylinder Kit \/ Block Piston Kit \/ Bore Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBest-Supported Application\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHero Xtreme 125R \/ Xtreme 125 where exact SKU is confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent Seller Price Reference\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e₹3,350\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOfficial Packet MRP\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVerify physical Hero packet; packet MRP takes priority\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExact Kit Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVerify sealed Hero package before listing individual components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitment Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExact SKU, model year, OBD generation, engine family, piston\/cylinder specification, and EPC\/VIN must match\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation Note\u003c\/h3\u003e\n\u003cp\u003eProfessional engine installation is strongly recommended. Before assembly, inspect the cylinder head, valves, connecting rod, crankshaft play, oil pump, cam chain, guides, tensioner, cylinder studs, mating surfaces, and lubrication system. Confirm piston orientation, ring end gaps, timing marks, tightening sequence, torque values, and valve clearance before starting the engine.\u003c\/p\u003e\n\u003ch3\u003eBuyer-Focused FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1. What is Hero part number K12121ACLA000S?\u003c\/strong\u003e\u003cbr\u003eIt is a Hero Genuine Cylinder Kit, commonly called a block piston kit or bore kit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2. Is this for Hero Xtreme 125R?\u003c\/strong\u003e\u003cbr\u003eThe strongest researched application is Hero Xtreme 125R \/ Xtreme 125. Confirm the exact SKU through the Hero EPC, VIN, old packet, or existing kit before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3. Does it fit every Xtreme 125R?\u003c\/strong\u003e\u003cbr\u003eDo not rely only on the model name. Confirm the manufacturing year, OBD generation, and exact part number because engine-part revisions can occur.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4. Does it fit Glamour or Super Splendor?\u003c\/strong\u003e\u003cbr\u003eNo such compatibility is being claimed for this SKU. Those models use other cylinder-kit part numbers in several applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5. Are the piston, rings, pin, clips, and gaskets included?\u003c\/strong\u003e\u003cbr\u003eThe exact public kit BOM is unavailable. Check the sealed Hero package before promising individual components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ6. Is this a performance big-bore kit?\u003c\/strong\u003e\u003cbr\u003eNo. It is a genuine replacement cylinder kit, not a capacity-increase or racing kit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ7. Should a mechanic install it?\u003c\/strong\u003e\u003cbr\u003eYes. Cylinder-kit replacement requires precision measurements, engine timing, lubrication, torque control, and post-assembly checks.\u003c\/p\u003e","brand":"Hero MotoCorp","offers":[{"title":"Default Title","offer_id":51773182411047,"sku":"K12121ACLA000S","price":3650.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/Hero_Xtreme_125R_Cylinder_Kit_Genuine_Block_Piston_Bore_Kit_K12121ACLA000S.jpg?v=1785674014","url":"https:\/\/underthehood.co.in\/products\/hero-xtreme-125r-cylinder-kit-k12121acla000s","provider":"UNDER THE HOOD","version":"1.0","type":"link"}