{"product_id":"hero-cylinder-std-kit-cd-100-ss-21k120ls","title":"Hero Genuine Cylinder STD Kit \/ Block Piston Kit for CD 100 SS (formerly CD 100 SS Mar 2005) – 21K120LS","description":"\u003ch2\u003eHero Genuine Cylinder STD Kit \/ Block Piston Kit – 21K120LS\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHero Genuine 21K120LS\u003c\/strong\u003e is a \u003cstrong\u003eCylinder STD Kit\u003c\/strong\u003e, sold by Hero as a complete OEM engine rebuild \/ engine cylinder block kit with piston for the \u003cstrong\u003eCD 100\u003c\/strong\u003e family. Independent seller references tighten the application more precisely to \u003cstrong\u003e100 SS \/ formerly CD 100 SS\u003c\/strong\u003e. The part is sold as \u003cstrong\u003e1 unit\u003c\/strong\u003e and is positioned as a top-end engine rebuild component.\u003c\/p\u003e\n\u003cp\u003eFor buyer-language SEO, this product should target both OEM and market terms such as \u003cstrong\u003ecylinder std kit\u003c\/strong\u003e, \u003cstrong\u003eblock piston kit\u003c\/strong\u003e, \u003cstrong\u003ebore kit\u003c\/strong\u003e, \u003cstrong\u003eblock piston assembly\u003c\/strong\u003e, and \u003cstrong\u003ecylinder kit\u003c\/strong\u003e. Independent references use these alternate names for the same SKU, which helps broaden search coverage without changing the actual product identity.\u003c\/p\u003e\n\u003cp\u003eBecause this is a major top-end engine repair part, the listing stays \u003cstrong\u003etight and model-specific\u003c\/strong\u003e. The strongest match is \u003cstrong\u003e100 SS \/ CD 100 SS\u003c\/strong\u003e, not a broad all-Hero commuter fitment claim. Buyers should verify \u003cstrong\u003e21K120LS\u003c\/strong\u003e against the old part, engine build requirement, or mechanic recommendation before ordering.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Hero OEM part\u003c\/strong\u003e with part number \u003cstrong\u003e21K120LS\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eOfficial Hero naming centers on \u003cstrong\u003eEngine Cylinder Block Kit with Piston \/ Cylinder STD Kit\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eStrongest supported fitment is \u003cstrong\u003eCD 100 \/ 100 SS \/ formerly CD 100 SS\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eAlso commonly searched as \u003cstrong\u003eBlock Piston Kit\u003c\/strong\u003e, \u003cstrong\u003eBore Kit\u003c\/strong\u003e, \u003cstrong\u003eBlock Piston Assembly\u003c\/strong\u003e, and \u003cstrong\u003eCylinder Kit\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eSold as \u003cstrong\u003e1 unit\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eSuitable for stock-spec engine top-end rebuild or cylinder replacement work.\u003c\/li\u003e\n\u003cli\u003eBest ordered by \u003cstrong\u003eexact part number match\u003c\/strong\u003e on older Hero\/Hero Honda applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility Table\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eVariant \/ Family\u003c\/th\u003e\n\u003cth\u003eCompatibility Status\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCD 100\u003c\/td\u003e\n\u003ctd\u003eOfficial Hero listing\u003c\/td\u003e\n\u003ctd\u003eConfirmed\u003c\/td\u003e\n\u003ctd\u003eHero shop presents it as CD 100 rebuild kit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100 SS\u003c\/td\u003e\n\u003ctd\u003eFormerly CD 100 SS\u003c\/td\u003e\n\u003ctd\u003eConfirmed\u003c\/td\u003e\n\u003ctd\u003eStrong seller-side fitment wording.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eH.H. CD100SS\u003c\/td\u003e\n\u003ctd\u003eLegacy naming\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003ctd\u003eSeen in independent dealer reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eFitment caution:\u003c\/strong\u003e The safest merchandising position is \u003cstrong\u003eCD 100 SS \/ 100 SS\u003c\/strong\u003e, because official shop wording is broader while independent seller and dealer references narrow it more precisely.\u003c\/p\u003e\n\u003ch3\u003eVariants\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo LH\/RH variant found.\u003c\/li\u003e\n\u003cli\u003eSold as \u003cstrong\u003e1 unit\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eNo color variant indicated.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat’s in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Hero Genuine Cylinder STD Kit \/ Engine Cylinder Block Kit with Piston\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation \/ Fitment Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMatch \u003cstrong\u003e21K120LS\u003c\/strong\u003e with the old kit before ordering.\u003c\/li\u003e\n\u003cli\u003eRecommended for engine rebuild, top-end repair, or standard-bore cylinder replacement.\u003c\/li\u003e\n\u003cli\u003eBest suited to \u003cstrong\u003eCD 100 \/ 100 SS\u003c\/strong\u003e applications supported above.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended because this is a major engine internal \/ top-end component.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1. Is 21K120LS a genuine Hero part?\u003c\/strong\u003e\u003cbr\u003eYes, Hero’s official shop lists \u003cstrong\u003e21K120LS\u003c\/strong\u003e as a genuine Hero engine cylinder block kit with piston.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2. What is 21K120LS called?\u003c\/strong\u003e\u003cbr\u003eIt is commonly called \u003cstrong\u003eCylinder STD Kit\u003c\/strong\u003e, \u003cstrong\u003eBlock Piston Kit\u003c\/strong\u003e, \u003cstrong\u003eBore Kit\u003c\/strong\u003e, or \u003cstrong\u003eCylinder Kit\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3. What bike does 21K120LS fit?\u003c\/strong\u003e\u003cbr\u003eThe strongest supported application is \u003cstrong\u003e100 SS \/ formerly CD 100 SS\u003c\/strong\u003e, while Hero’s own shop broadly presents it as a \u003cstrong\u003eCD 100\u003c\/strong\u003e kit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4. Is this a full engine rebuild kit?\u003c\/strong\u003e\u003cbr\u003eNo Hero markets it as an \u003cstrong\u003eEngine Cylinder Block Kit with Piston.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5. Does it fit all CD 100 variants?\u003c\/strong\u003e\u003cbr\u003eThat should not be stated broadly. The safer fitment position is \u003cstrong\u003eCD 100 SS \/ 100 SS\u003c\/strong\u003e, verified by exact part number.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ6. How many pieces are included?\u003c\/strong\u003e\u003cbr\u003eThe current official and seller listings show \u003cstrong\u003e1 unit\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Hero","offers":[{"title":"Default Title","offer_id":51178973790503,"sku":"21K120LS","price":1780.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/Hero_Genuine_Cylinder_STD_Kit_Block_Piston_Kit_for_CD_100_SS_formerly_CD_100_SS_Mar_2005_21K120LS.avif?v=1774113547","url":"https:\/\/underthehood.co.in\/products\/hero-cylinder-std-kit-cd-100-ss-21k120ls","provider":"UNDER THE HOOD","version":"1.0","type":"link"}