{"product_id":"royal-enfield-144068-cylinder-barrel-piston-kit-350cc-bullet-ci","title":"Royal Enfield 144068 – Cylinder Barrel \u0026 Piston Kit (3-Ring) – 350cc Cast-Iron Bullet (Std \/ Deluxe \/ Electra 4S\/5S \/ Old Models)","description":"\u003cp data-start=\"285\" data-end=\"647\"\u003eRoyal Enfield part \u003cstrong data-start=\"304\" data-end=\"314\"\u003e144068\u003c\/strong\u003e is the genuine \u003cstrong data-start=\"330\" data-end=\"416\"\u003eCylinder Barrel \u0026amp; Piston Kit (3-ring type) for 350cc cast-iron (CI) Bullet engines\u003c\/strong\u003e. Classic parts catalogues list it as \u003cstrong data-start=\"454\" data-end=\"484\"\u003e“CYL. \u0026amp; PISTON ASSY 350CC”\u003c\/strong\u003e, while multiple specialist dealers describe it as the OEM \u003cstrong data-start=\"543\" data-end=\"643\"\u003ecylinder barrel and piston kit 144068 for Bullet Standard 350 and other 350cc iron-barrel models\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"649\" data-end=\"1262\"\u003eThis kit replaces the complete cylinder barrel and piston assembly on older 350cc Bullets where the \u003cstrong data-start=\"749\" data-end=\"806\"\u003ecast-iron block is worn, scored or low on compression\u003c\/strong\u003e. Instead of oversize rebore guesswork and mismatch pistons, 144068 gives you a factory-matched barrel + piston set designed to restore correct clearances, ring sealing and compression on CI engines. Classic suppliers confirm it as suitable for \u003cstrong data-start=\"1051\" data-end=\"1085\"\u003e“all 350 Bullets 1955 onwards”\u003c\/strong\u003e and “350cc Royal Enfield motorcycles only,” covering the Indian-built Standard \/ Deluxe \/ Electra 4S\/5S \/ Campus \/ Machismo 350 range, but \u003cstrong data-start=\"1225\" data-end=\"1232\"\u003enot\u003c\/strong\u003e 500cc, AVL or UCE engines.\u003c\/p\u003e\n\u003cp data-start=\"1264\" data-end=\"1530\"\u003eIdeal for \u003cstrong data-start=\"1274\" data-end=\"1330\"\u003efull engine rebuilds, restorations and export builds\u003c\/strong\u003e, this kit arrives in genuine Royal Enfield–branded or OEM-equivalent packing (depending on latest supply), ready to bolt on after you check piston-to-head squish and ring gaps as per workshop manual.\u003c\/p\u003e\n\u003cblockquote data-start=\"1532\" data-end=\"1678\"\u003e\n\u003cp data-start=\"1534\" data-end=\"1678\"\u003e🔎 \u003cstrong data-start=\"1537\" data-end=\"1551\"\u003eImportant:\u003c\/strong\u003e This is \u003cstrong data-start=\"1560\" data-end=\"1596\"\u003efor 350cc cast-iron Bullets only\u003c\/strong\u003e. It does \u003cstrong data-start=\"1606\" data-end=\"1613\"\u003enot\u003c\/strong\u003e fit 350 UCE, J-Series, AVL (Lean Burn) or Himalayan \/ 650 Twins.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"1680\" data-end=\"1683\"\u003e\n\u003ch2 data-start=\"1685\" data-end=\"1700\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"1702\" data-end=\"2504\"\u003e\n\u003cli data-start=\"1702\" data-end=\"1792\"\u003e\n\u003cp data-start=\"1704\" data-end=\"1792\"\u003e\u003cstrong data-start=\"1704\" data-end=\"1770\"\u003eGenuine-spec Royal Enfield 144068 Cylinder Barrel \u0026amp; Piston Kit\u003c\/strong\u003e – 350cc CI engine.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1793\" data-end=\"1901\"\u003e\n\u003cp data-start=\"1795\" data-end=\"1901\"\u003eIncludes \u003cstrong data-start=\"1804\" data-end=\"1858\"\u003ecomplete cylinder barrel + piston + 3 piston rings\u003c\/strong\u003e (3-ring type kit) – ready for assembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1902\" data-end=\"2017\"\u003e\n\u003cp data-start=\"1904\" data-end=\"2017\"\u003eDesigned for \u003cstrong data-start=\"1917\" data-end=\"1949\"\u003ecast-iron 350 Bullet engines\u003c\/strong\u003e – correct bore, stroke and compression for original performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2018\" data-end=\"2136\"\u003e\n\u003cp data-start=\"2020\" data-end=\"2136\"\u003eGenuine or factory-equivalent casting with proper \u003cstrong data-start=\"2070\" data-end=\"2109\"\u003ecooling fin layout and stud spacing\u003c\/strong\u003e for classic crankcases.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2137\" data-end=\"2235\"\u003e\n\u003cp data-start=\"2139\" data-end=\"2235\"\u003eEliminates low-compression, oil burning and blow-by issues caused by worn barrels and pistons.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2236\" data-end=\"2325\"\u003e\n\u003cp data-start=\"2238\" data-end=\"2325\"\u003eSuitable for \u003cstrong data-start=\"2251\" data-end=\"2303\"\u003erestoration, export builds and long-term touring\u003c\/strong\u003e on classic Bullets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2326\" data-end=\"2410\"\u003e\n\u003cp data-start=\"2328\" data-end=\"2410\"\u003eVerified by multiple vintage-Enfield specialists as replacement for OEM 144068.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2411\" data-end=\"2504\"\u003e\n\u003cp data-start=\"2413\" data-end=\"2504\"\u003ePackaged and shipped to protect the bore surface and piston crown from damage in transit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2506\" data-end=\"2509\"\u003e\n\u003ch2 data-start=\"2511\" data-end=\"2565\"\u003eCompatibility Table\u003c\/h2\u003e\n\u003cp data-start=\"2567\" data-end=\"2682\"\u003e\u003cstrong data-start=\"2567\" data-end=\"2583\"\u003eEngine type:\u003c\/strong\u003e 350cc Cast-Iron (CI) long-stroke Bullet engine (Indian Enfield \/ Royal Enfield, pre-AVL, pre-UCE).\u003c\/p\u003e\n\u003cdiv class=\"_tableContainer_1rjym_1\"\u003e\n\u003cdiv class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"2684\" data-end=\"3596\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"2684\" data-end=\"2784\"\u003e\n\u003ctr data-start=\"2684\" data-end=\"2784\"\u003e\n\u003cth data-start=\"2684\" data-end=\"2720\" data-col-size=\"sm\"\u003eModel \/ Family\u003c\/th\u003e\n\u003cth data-start=\"2720\" data-end=\"2743\" data-col-size=\"sm\"\u003eEngine Type\u003c\/th\u003e\n\u003cth data-start=\"2743\" data-end=\"2765\" data-col-size=\"sm\"\u003eApprox Years*\u003c\/th\u003e\n\u003cth data-start=\"2765\" data-end=\"2775\" data-col-size=\"sm\"\u003eStatus\u003c\/th\u003e\n\u003cth data-start=\"2775\" data-end=\"2784\" data-col-size=\"md\"\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2885\" data-end=\"3596\"\u003e\n\u003ctr data-start=\"2885\" data-end=\"3067\"\u003e\n\u003ctd data-start=\"2885\" data-end=\"2920\" data-col-size=\"sm\"\u003eBullet 350 Standard (cast-iron)\u003c\/td\u003e\n\u003ctd data-start=\"2920\" data-end=\"2943\" data-col-size=\"sm\"\u003e346cc CI, 4-stroke\u003c\/td\u003e\n\u003ctd data-start=\"2943\" data-end=\"2965\" data-col-size=\"sm\"\u003e~1955–2007\u003c\/td\u003e\n\u003ctd data-start=\"2965\" data-end=\"2979\" data-col-size=\"sm\"\u003e✅ Confirmed\u003c\/td\u003e\n\u003ctd data-start=\"2979\" data-end=\"3067\" data-col-size=\"md\"\u003eMultiple specialists list 144068 as Bullet Std 350 CI cylinder barrel \u0026amp; piston kit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3068\" data-end=\"3243\"\u003e\n\u003ctd data-start=\"3068\" data-end=\"3103\" data-col-size=\"sm\"\u003eBullet 350 Deluxe (CI)\u003c\/td\u003e\n\u003ctd data-start=\"3103\" data-end=\"3126\" data-col-size=\"sm\"\u003e346cc CI\u003c\/td\u003e\n\u003ctd data-start=\"3126\" data-end=\"3148\" data-col-size=\"sm\"\u003e~1980s–2000s\u003c\/td\u003e\n\u003ctd data-start=\"3148\" data-end=\"3162\" data-col-size=\"sm\"\u003e✅ Confirmed\u003c\/td\u003e\n\u003ctd data-start=\"3162\" data-end=\"3243\" data-col-size=\"md\"\u003eCI Bullet variant; covered under “350cc models only \/ old models 1980–2000”.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3244\" data-end=\"3438\"\u003e\n\u003ctd data-start=\"3244\" data-end=\"3279\" data-col-size=\"sm\"\u003eElectra 4S \/ 5S 350 (cast-iron)\u003c\/td\u003e\n\u003ctd data-start=\"3279\" data-end=\"3302\" data-col-size=\"sm\"\u003e346cc CI (4S\/5S)\u003c\/td\u003e\n\u003ctd data-start=\"3302\" data-end=\"3324\" data-col-size=\"sm\"\u003e~2000–2004 (CI)\u003c\/td\u003e\n\u003ctd data-start=\"3324\" data-end=\"3338\" data-col-size=\"sm\"\u003e✅ Confirmed\u003c\/td\u003e\n\u003ctd data-start=\"3338\" data-end=\"3438\" data-col-size=\"md\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3439\" data-end=\"3596\"\u003e\n\u003ctd data-start=\"3439\" data-end=\"3474\" data-col-size=\"sm\"\u003eCampus \/ Machismo 350 (CI)\u003c\/td\u003e\n\u003ctd data-start=\"3474\" data-end=\"3497\" data-col-size=\"sm\"\u003e346cc CI\u003c\/td\u003e\n\u003ctd data-start=\"3497\" data-end=\"3519\" data-col-size=\"sm\"\u003eSelected years\u003c\/td\u003e\n\u003ctd data-start=\"3519\" data-end=\"3533\" data-col-size=\"sm\"\u003e✅ Confirmed\u003c\/td\u003e\n\u003ctd data-start=\"3533\" data-end=\"3596\" data-col-size=\"md\"\u003eListed by classic suppliers as compatible 350cc CI models.\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=\"3598\" data-end=\"3732\"\u003e*Years approximate; CI production overlapped across markets. Always confirm via engine number and old barrel casting before ordering.\u003c\/p\u003e\n\u003cblockquote data-start=\"3734\" data-end=\"4190\"\u003e\n\u003cp data-start=\"4100\" data-end=\"4190\"\u003e\u003cspan style=\"color: rgb(255, 0, 0);\"\u003e\u003cstrong\u003ePLEASE CHECK PART NUMBER BEFORE PURCHASE \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"4192\" data-end=\"4195\"\u003e\n\u003ch2 data-start=\"4197\" data-end=\"4208\"\u003eVariants\u003c\/h2\u003e\n\u003cul data-start=\"4210\" data-end=\"4425\"\u003e\n\u003cli data-start=\"4210\" data-end=\"4425\"\u003e\n\u003cp data-start=\"4212\" data-end=\"4231\"\u003e\u003cstrong data-start=\"4212\" data-end=\"4229\"\u003eThis listing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"4234\" data-end=\"4425\"\u003e\n\u003cli data-start=\"4234\" data-end=\"4261\"\u003e\n\u003cp data-start=\"4236\" data-end=\"4261\"\u003ePart Number: \u003cstrong data-start=\"4249\" data-end=\"4259\"\u003e144068\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4264\" data-end=\"4346\"\u003e\n\u003cp data-start=\"4266\" data-end=\"4346\"\u003eDescription: \u003cstrong data-start=\"4279\" data-end=\"4344\"\u003eCylinder Barrel \u0026amp; Piston Kit (3-Ring), 350cc Cast-Iron Bullet\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4349\" data-end=\"4425\"\u003e\n\u003cp data-start=\"4351\" data-end=\"4425\"\u003eConfiguration: 1 × barrel + 1 × piston + ring set (standard CI 350 size)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4427\" data-end=\"4535\"\u003eIf you need \u003cstrong data-start=\"4439\" data-end=\"4459\"\u003eoversize pistons\u003c\/strong\u003e or \u003cstrong data-start=\"4463\" data-end=\"4477\"\u003e500cc kits\u003c\/strong\u003e, they use different part numbers – not covered by 144068.\u003c\/p\u003e\n\u003chr data-start=\"4537\" data-end=\"4540\"\u003e\n\u003ch2 data-start=\"4542\" data-end=\"4549\"\u003eFAQs\u003c\/h2\u003e\n\u003cp data-start=\"4551\" data-end=\"4861\"\u003e\u003cstrong data-start=\"4551\" data-end=\"4598\"\u003eQ1. Which engines does 144068 actually fit?\u003c\/strong\u003e\u003cbr data-start=\"4598\" data-end=\"4601\"\u003e\u003cstrong data-start=\"4601\" data-end=\"4607\"\u003eA:\u003c\/strong\u003e 144068 is for \u003cstrong data-start=\"4622\" data-end=\"4666\"\u003e350cc cast-iron (CI) Bullet engines only\u003c\/strong\u003e – Standard, Deluxe, early Electra 4S\/5S and similar 350 CI variants. Classic catalogues describe it as “CYL. \u0026amp; PISTON ASSY 350CC,” and multiple suppliers market it as a 350cc Bullet kit only.\u003c\/p\u003e\n\u003chr data-start=\"4863\" data-end=\"4866\"\u003e\n\u003cp data-start=\"4868\" data-end=\"5146\"\u003e\u003cstrong data-start=\"4868\" data-end=\"4932\"\u003eQ2. Does this fit Bullet 350 UCE or new Bullet 350 J-Series?\u003c\/strong\u003e\u003cbr data-start=\"4932\" data-end=\"4935\"\u003e\u003cstrong data-start=\"4935\" data-end=\"4941\"\u003eA:\u003c\/strong\u003e No. UCE and J-Series engines use completely different alloy cylinders and part numbers. 144068 is for \u003cstrong data-start=\"5044\" data-end=\"5109\"\u003eold cast-iron engines with separate iron barrel and crankcase\u003c\/strong\u003e, not for UCE or J platform bikes.\u003c\/p\u003e\n\u003chr data-start=\"5148\" data-end=\"5151\"\u003e\n\u003cp data-start=\"5153\" data-end=\"5518\"\u003e\u003cstrong data-start=\"5153\" data-end=\"5234\"\u003eQ3. Some sites show Bullet 500 \/ Lightning 500 with 144068 – is that correct?\u003c\/strong\u003e\u003cbr data-start=\"5234\" data-end=\"5237\"\u003e\u003cstrong data-start=\"5237\" data-end=\"5243\"\u003eA:\u003c\/strong\u003e We treat that as \u003cstrong data-start=\"5261\" data-end=\"5292\"\u003eincorrect \/ generic tagging\u003c\/strong\u003e. Factory lists and specialist shops define 144068 as a \u003cstrong data-start=\"5348\" data-end=\"5361\"\u003e350cc kit\u003c\/strong\u003e; 500\/535 engines use different bore and dedicated part numbers. To avoid returns and engine damage, we do \u003cstrong data-start=\"5468\" data-end=\"5475\"\u003enot\u003c\/strong\u003e recommend 144068 for any 500\/535 model.\u003c\/p\u003e\n\u003chr data-start=\"5520\" data-end=\"5523\"\u003e\n\u003cp data-start=\"5525\" data-end=\"5795\"\u003e\u003cstrong data-start=\"5525\" data-end=\"5571\"\u003eQ4. Is this kit standard size or oversize?\u003c\/strong\u003e\u003cbr data-start=\"5571\" data-end=\"5574\"\u003e\u003cstrong data-start=\"5574\" data-end=\"5580\"\u003eA:\u003c\/strong\u003e Classic suppliers list it as a \u003cstrong data-start=\"5612\" data-end=\"5657\"\u003e“STD complete” cylinder + piston assembly\u003c\/strong\u003e for 350 Bullets. Any rebore\/oversize work must be done by a machine shop using the correct oversize piston, which is a different part.\u003c\/p\u003e\n\u003chr data-start=\"5797\" data-end=\"5800\"\u003e\n\u003cp data-start=\"5802\" data-end=\"6086\"\u003e\u003cstrong data-start=\"5802\" data-end=\"5857\"\u003eQ5. What else should I replace during installation?\u003c\/strong\u003e\u003cbr data-start=\"5857\" data-end=\"5860\"\u003e\u003cstrong data-start=\"5860\" data-end=\"5866\"\u003eA:\u003c\/strong\u003e At minimum: \u003cstrong data-start=\"5879\" data-end=\"5939\"\u003ehead gasket, base gasket, circlips, small-end bush check\u003c\/strong\u003e, and a full decarbon + valve-lap. Many builders also fit new cam followers, timing side bearings and oil pump check if the engine is already open.\u003c\/p\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":50772150714663,"sku":null,"price":5140.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/ChatGPTImageDec2_2025_10_22_57PM_acb6027f-69ad-428a-ad63-7e04d55b8f5a.png?v=1764701151","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-144068-cylinder-barrel-piston-kit-350cc-bullet-ci","provider":"UNDER THE HOOD","version":"1.0","type":"link"}