{"product_id":"royal-enfield-144039-decoke-gasket-kit-350cc-bullet-ci","title":"Royal Enfield 144039 – Decoke Gasket Kit (CAF Material) – 350cc Cast-Iron Bullet (Std \/ Deluxe \/ Machismo \/ Campus \/ Electra 4S–5S – Pre-UCE)","description":"\u003cp data-end=\"642\" data-start=\"288\"\u003eRoyal Enfield part \u003cstrong data-end=\"317\" data-start=\"307\"\u003e144039\u003c\/strong\u003e is the genuine \u003cstrong data-end=\"369\" data-start=\"333\"\u003eDecoke Gasket Kit – CAF Material\u003c\/strong\u003e for \u003cstrong data-end=\"413\" data-start=\"374\"\u003e350cc cast-iron (CI) Bullet engines\u003c\/strong\u003e. Official Royal Enfield part lists describe it as \u003cstrong data-end=\"516\" data-start=\"464\"\u003e“GASKET DE CARBONISI” \/ “GASKET KIT – CAF MATL.”\u003c\/strong\u003e, and classic catalogues and dealers sell it specifically as a \u003cstrong data-end=\"614\" data-start=\"579\"\u003e350cc de-carbonising gasket set\u003c\/strong\u003e for Indian-made Bullets.\u003c\/p\u003e\n\u003cp data-end=\"1113\" data-start=\"644\"\u003eSpecialist suppliers like Hitchcock’s list 144039 as a \u003cstrong data-end=\"760\" data-start=\"699\"\u003e“GASKET SET, INDIAN MADE 350cc, DECARBONISING, 1977–2007”\u003c\/strong\u003e, clearly positioning it as the \u003cstrong data-end=\"816\" data-start=\"792\"\u003etop-end \/ decoke kit\u003c\/strong\u003e for 350cc CI Bullets, not a full engine set. The Spares Company and other vintage-RE sellers also label it as \u003cstrong data-end=\"960\" data-start=\"929\"\u003e“Gasket Kit, Decarbonising”\u003c\/strong\u003e and confirm fitment across old-model 350 Bullets: \u003cstrong data-end=\"1109\" data-start=\"1011\"\u003eBullet 350 (1955), Deluxe (1986), Machismo (1989), Campus (1997), Electra 4S \u0026amp; 5S KS\/ES (2005)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-end=\"1554\" data-start=\"1115\"\u003eThis kit includes the key \u003cstrong data-end=\"1160\" data-start=\"1141\"\u003etop-end gaskets\u003c\/strong\u003e required when you decarbonise the head, lap valves or freshen up the piston \/ rings – typically head gasket, rocker box, exhaust flange and related joints – manufactured in \u003cstrong data-end=\"1385\" data-start=\"1334\"\u003eCAF (asbestos-free fibre) and OE-spec materials\u003c\/strong\u003e for good sealing and heat resistance. It’s ideal when you are opening only the \u003cstrong data-end=\"1476\" data-start=\"1465\"\u003etop end\u003c\/strong\u003e and don’t want to buy a full engine gasket set (which is part \u003cstrong data-end=\"1549\" data-start=\"1539\"\u003e144040\u003c\/strong\u003e).\u003c\/p\u003e\n\u003chr data-end=\"1815\" data-start=\"1812\"\u003e\n\u003ch2 data-end=\"1832\" data-start=\"1817\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-end=\"2676\" data-start=\"1834\"\u003e\n\u003cli data-end=\"1966\" data-start=\"1834\"\u003e\n\u003cp data-end=\"1966\" data-start=\"1836\"\u003e\u003cstrong data-end=\"1873\" data-start=\"1836\"\u003eGenuine Royal Enfield part 144039\u003c\/strong\u003e – listed as \u003cstrong data-end=\"1938\" data-start=\"1886\"\u003e“GASKET KIT – CAF MATL.” \/ “GASKET DE CARBONISI”\u003c\/strong\u003e in official price lists.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2060\" data-start=\"1967\"\u003e\n\u003cp data-end=\"2060\" data-start=\"1969\"\u003eDesigned as a \u003cstrong data-end=\"2020\" data-start=\"1983\"\u003e350cc decoke \/ top-end gasket set\u003c\/strong\u003e for Indian-made Bullets (1977–2007).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2180\" data-start=\"2061\"\u003e\n\u003cp data-end=\"2180\" data-start=\"2063\"\u003eCAF (compressed asbestos-free fibre) and OE-grade materials – built for \u003cstrong data-end=\"2162\" data-start=\"2135\"\u003eheat, oil and vibration\u003c\/strong\u003e in CI engines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2285\" data-start=\"2181\"\u003e\n\u003cp data-end=\"2285\" data-start=\"2183\"\u003eIdeal for \u003cstrong data-end=\"2230\" data-start=\"2193\"\u003edecarbonising and top-end refresh\u003c\/strong\u003e – head removal, valve work, piston\/ring inspection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2385\" data-start=\"2286\"\u003e\n\u003cp data-end=\"2385\" data-start=\"2288\"\u003eFactory-correct profiles for ports and stud patterns – less trimming and rework vs local kits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2485\" data-start=\"2386\"\u003e\n\u003cp data-end=\"2485\" data-start=\"2388\"\u003eHelps reduce \u003cstrong data-end=\"2437\" data-start=\"2401\"\u003eoil seepage and compression loss\u003c\/strong\u003e after a top-end job when installed correctly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2573\" data-start=\"2486\"\u003e\n\u003cp data-end=\"2573\" data-start=\"2488\"\u003ePerfect for workshops handling \u003cstrong data-end=\"2570\" data-start=\"2519\"\u003epre-UCE Bullet rebuilds and regular decoke jobs\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2676\" data-start=\"2574\"\u003e\n\u003cp data-end=\"2676\" data-start=\"2576\"\u003ePairs well with \u003cstrong data-end=\"2625\" data-start=\"2592\"\u003e144040 full engine gasket set\u003c\/strong\u003e when both top and bottom end are being rebuilt.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2681\" data-start=\"2678\"\u003e\n\u003ch2 data-end=\"2740\" data-start=\"2683\"\u003eCompatibility Table\u003c\/h2\u003e\n\u003cp data-end=\"2865\" data-start=\"2742\"\u003e\u003cstrong data-end=\"2763\" data-start=\"2742\"\u003eCore engine type:\u003c\/strong\u003e 346cc \u003cstrong data-end=\"2865\" data-start=\"2770\"\u003ecast-iron Bullet (separate iron barrel + crankcases, distributor \/ points or CDI, pre-UCE).\u003c\/strong\u003e\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 class=\"w-fit min-w-(--thread-content-width)\" data-end=\"4033\" data-start=\"2867\"\u003e\n\u003cthead data-end=\"2974\" data-start=\"2867\"\u003e\n\u003ctr data-end=\"2974\" data-start=\"2867\"\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2908\" data-start=\"2867\"\u003eModel \/ Family\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2931\" data-start=\"2908\"\u003eEngine Type\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2956\" data-start=\"2931\"\u003eEmission \/ Era\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"2965\" data-start=\"2956\"\u003eStatus\u003c\/th\u003e\n\u003cth data-col-size=\"md\" data-end=\"2974\" data-start=\"2965\"\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"4033\" data-start=\"3083\"\u003e\n\u003ctr data-end=\"3273\" data-start=\"3083\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3124\" data-start=\"3083\"\u003eBullet 350 Standard (old)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3147\" data-start=\"3124\"\u003e346cc CI, carb\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3172\" data-start=\"3147\"\u003e~1955–2007 (pre-UCE)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3186\" data-start=\"3172\"\u003e✅ Confirmed\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"3273\" data-start=\"3186\"\u003eListed under 144039 “Gasket Kit – CAF Matl \/ decarbonising” for Bullet 350 (1955).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"3430\" data-start=\"3274\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3315\" data-start=\"3274\"\u003eBullet 350 Deluxe\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3338\" data-start=\"3315\"\u003e346cc CI, carb\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3363\" data-start=\"3338\"\u003e~1980s–2000s\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3377\" data-start=\"3363\"\u003e✅ Confirmed\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"3430\" data-start=\"3377\"\u003eIncluded in model list (Deluxe 1986) for 144039.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"3578\" data-start=\"3431\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3472\" data-start=\"3431\"\u003eMachismo 350 (cast-iron)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3495\" data-start=\"3472\"\u003e346cc CI, carb\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3520\" data-start=\"3495\"\u003e~late 1980s–2000s\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3534\" data-start=\"3520\"\u003e✅ Confirmed\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"3578\" data-start=\"3534\"\u003eSparesCo fitment list: Machismo (1989).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"3722\" data-start=\"3579\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3620\" data-start=\"3579\"\u003eCampus 350\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3643\" data-start=\"3620\"\u003e346cc CI, carb\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3668\" data-start=\"3643\"\u003e~1990s–2000s\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3682\" data-start=\"3668\"\u003e✅ Confirmed\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"3722\" data-start=\"3682\"\u003eListed as Campus (1997) for 144039.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"3878\" data-start=\"3723\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3764\" data-start=\"3723\"\u003eElectra 4S 350 (KS \/ ES – CI)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3787\" data-start=\"3764\"\u003e346cc CI 4-speed\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3812\" data-start=\"3787\"\u003e~early 2000s (pre-AVL)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3826\" data-start=\"3812\"\u003e✅ Confirmed\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"3878\" data-start=\"3826\"\u003e“Electra 4S-KS\/ES (2005)” under 144039 fitment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"4033\" data-start=\"3879\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3920\" data-start=\"3879\"\u003eElectra 5S 350 (KS \/ ES – CI)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3943\" data-start=\"3920\"\u003e346cc CI 5-speed\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3968\" data-start=\"3943\"\u003e~early 2000s (pre-AVL)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"3982\" data-start=\"3968\"\u003e✅ Confirmed\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-end=\"4033\" data-start=\"3982\"\u003e“Electra 5S-KS\/ES (2005)” listed for this kit.\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-end=\"4517\" data-start=\"4489\"\u003e\u003cspan style=\"color: rgb(255, 14, 14);\"\u003e\u003cstrong\u003eCHECK PART NUMBER BEFORE PURCHASE \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-end=\"4856\" data-start=\"4853\"\u003e\n\u003ch2 data-end=\"4869\" data-start=\"4858\"\u003eVariants\u003c\/h2\u003e\n\u003cul data-end=\"5285\" data-start=\"4871\"\u003e\n\u003cli data-end=\"5118\" data-start=\"4871\"\u003e\n\u003cp data-end=\"4892\" data-start=\"4873\"\u003e\u003cstrong data-end=\"4890\" data-start=\"4873\"\u003eThis listing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"5118\" data-start=\"4895\"\u003e\n\u003cli data-end=\"4922\" data-start=\"4895\"\u003e\n\u003cp data-end=\"4922\" data-start=\"4897\"\u003ePart Number: \u003cstrong data-end=\"4920\" data-start=\"4910\"\u003e144039\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5013\" data-start=\"4925\"\u003e\n\u003cp data-end=\"5013\" data-start=\"4927\"\u003eDescription: \u003cstrong data-end=\"5011\" data-start=\"4940\"\u003eDecoke \/ Top-End Gasket Kit – CAF Material – 350cc Cast-Iron Bullet\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5118\" data-start=\"5016\"\u003e\n\u003cp data-end=\"5118\" data-start=\"5018\"\u003eContents: Top-end gasket set for de-carbonising \/ head work (exact contents per latest OE packing)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"5285\" data-start=\"5120\"\u003e\n\u003cp data-end=\"5168\" data-start=\"5122\"\u003e\u003cstrong data-end=\"5166\" data-start=\"5122\"\u003eRelated (for cross-sell, separate SKUs):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"5285\" data-start=\"5171\"\u003e\n\u003cli data-end=\"5285\" data-start=\"5171\"\u003e\n\u003cp data-end=\"5285\" data-start=\"5173\"\u003e\u003cstrong data-end=\"5214\" data-start=\"5173\"\u003e144040 – Full Engine Gasket Set (CAF)\u003c\/strong\u003e for CI Bullet \/ Electra \/ Lightning – when doing complete rebuilds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"5290\" data-start=\"5287\"\u003e\n\u003ch2 data-end=\"5299\" data-start=\"5292\"\u003eFAQs\u003c\/h2\u003e\n\u003cp data-end=\"5610\" data-start=\"5301\"\u003e\u003cstrong data-end=\"5357\" data-start=\"5301\"\u003eQ1. What’s the difference between 144039 and 144040?\u003c\/strong\u003e\u003cbr data-end=\"5360\" data-start=\"5357\"\u003e\u003cstrong data-end=\"5366\" data-start=\"5360\"\u003eA:\u003c\/strong\u003e 144039 is a \u003cstrong data-end=\"5410\" data-start=\"5379\"\u003edecoke \/ top-end gasket kit\u003c\/strong\u003e for 350cc CI Bullets – used mainly when removing the cylinder head and doing valve \/ piston work. 144040 is a \u003cstrong data-end=\"5551\" data-start=\"5521\"\u003ecomplete engine gasket set\u003c\/strong\u003e covering crankcases, chaincase etc. for full overhauls.\u003c\/p\u003e\n\u003chr data-end=\"5615\" data-start=\"5612\"\u003e\n\u003cp data-end=\"5873\" data-start=\"5617\"\u003e\u003cstrong data-end=\"5681\" data-start=\"5617\"\u003eQ2. Will 144039 fit my Bullet 350 UCE or Classic 350 Reborn?\u003c\/strong\u003e\u003cbr data-end=\"5684\" data-start=\"5681\"\u003e\u003cstrong data-end=\"5690\" data-start=\"5684\"\u003eA:\u003c\/strong\u003e No. 144039 is only for \u003cstrong data-end=\"5741\" data-start=\"5714\"\u003eolder cast-iron Bullets\u003c\/strong\u003e (separate iron barrel). UCE and J-Series bikes use totally different alloy cylinders and gasket layouts with other part numbers.\u003c\/p\u003e\n\u003chr data-end=\"5878\" data-start=\"5875\"\u003e\n\u003cp data-end=\"6268\" data-start=\"5880\"\u003e\u003cstrong data-end=\"5940\" data-start=\"5880\"\u003eQ3. Can I use this kit on a Bullet 500 or Lightning 535?\u003c\/strong\u003e\u003cbr data-end=\"5943\" data-start=\"5940\"\u003e\u003cstrong data-end=\"5949\" data-start=\"5943\"\u003eA:\u003c\/strong\u003e \u003c\/p\u003e\n\u003chr data-end=\"6273\" data-start=\"6270\"\u003e\n\u003cp data-end=\"6351\" data-start=\"6275\"\u003e\u003cstrong data-end=\"6315\" data-start=\"6275\"\u003eQ4. What jobs is this kit ideal for?\u003c\/strong\u003e\u003cbr data-end=\"6318\" data-start=\"6315\"\u003e\u003cstrong data-end=\"6324\" data-start=\"6318\"\u003eA:\u003c\/strong\u003e Use 144039 when you are:\u003c\/p\u003e\n\u003cul data-end=\"6581\" data-start=\"6352\"\u003e\n\u003cli data-end=\"6390\" data-start=\"6352\"\u003e\n\u003cp data-end=\"6390\" data-start=\"6354\"\u003eDe-carbonising the head and piston\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"6438\" data-start=\"6391\"\u003e\n\u003cp data-end=\"6438\" data-start=\"6393\"\u003eLapping valves \/ replacing valve stem seals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"6581\" data-start=\"6439\"\u003e\n\u003cp data-end=\"6581\" data-start=\"6441\"\u003eChecking or replacing piston rings on a CI 350\u003cbr data-end=\"6490\" data-start=\"6487\"\u003eAny time the \u003cstrong data-end=\"6535\" data-start=\"6503\"\u003ehead and rocker box come off\u003c\/strong\u003e, a fresh decoke gasket set is recommended.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"6586\" data-start=\"6583\"\u003e\n\u003cp data-end=\"6877\" data-start=\"6588\"\u003e\u003cstrong data-end=\"6634\" data-start=\"6588\"\u003eQ5. Do I still need sealant with this kit?\u003c\/strong\u003e\u003cbr data-end=\"6637\" data-start=\"6634\"\u003e\u003cstrong data-end=\"6643\" data-start=\"6637\"\u003eA:\u003c\/strong\u003e Follow the \u003cstrong data-end=\"6674\" data-start=\"6655\"\u003eworkshop manual\u003c\/strong\u003e – generally, a thin smear of appropriate sealant is used only on certain joints (if specified). Over-use of sealant can squeeze into oil passages, so rely on the gasket faces themselves for most joints.\u003c\/p\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":50771483689255,"sku":null,"price":218.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/DFCF17DA-EB6C-4932-B1F1-9B855E3250B8.jpg?v=1775204757","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-144039-decoke-gasket-kit-350cc-bullet-ci","provider":"UNDER THE HOOD","version":"1.0","type":"link"}