{"product_id":"royal-enfield-143907-chaincase-outer-front-half-bullet-350-500-4-speed","title":"Royal Enfield 143907 – Chaincase Outer (Front Half, Inches Thread) for Old Bullet 350 \/ 500, Electra, Machismo, Lightning, Thunderbird (Pre-March 2002, 4-Speed)","description":"\u003cp data-start=\"324\" data-end=\"925\"\u003eRoyal Enfield part \u003cstrong data-start=\"343\" data-end=\"353\"\u003e143907\u003c\/strong\u003e is the genuine \u003cstrong data-start=\"369\" data-end=\"424\"\u003e“CH.CASE FRONT HALF STD \/ Chaincase outer (Inches)”\u003c\/strong\u003e used as the \u003cstrong data-start=\"437\" data-end=\"470\"\u003eouter primary chaincase cover\u003c\/strong\u003e on classic cast-iron and early AVL Bullets and derivatives built \u003cstrong data-start=\"536\" data-end=\"556\"\u003eup to March 2002\u003c\/strong\u003e with \u003cstrong data-start=\"562\" data-end=\"600\"\u003eimperial-thread chaincase hardware\u003c\/strong\u003e. Royal Enfield’s retired-models parts catalogue lists 143907 as \u003cstrong data-start=\"665\" data-end=\"695\"\u003e“Chaincase outer (Inches)”\u003c\/strong\u003e for a wide range of CI models (Std, Deluxe, Machismo, Campus, Electra, Bullet 500, Lightning, Machismo A-series, Thunderbird) with a remark: “Before Mar ’02”, after which it is superseded by metric and CDI-specific chaincases.\u003c\/p\u003e\n\u003cp data-start=\"927\" data-end=\"1384\"\u003eBike-Parts-RoyalEnfield and multiple dealer price lists confirm \u003cstrong data-start=\"991\" data-end=\"1026\"\u003e143907 \/ CH.CASE FRONT HALF STD\u003c\/strong\u003e as an OEM part, while Hitchcocks describe it as \u003cstrong data-start=\"1075\" data-end=\"1140\"\u003e“CHAINCASE, OUTER (Imperial threads fitted up to March 2002)”\u003c\/strong\u003e, reinforcing the date and thread-type boundary. Sellers like Recart and The Spares Company label it as \u003cstrong data-start=\"1246\" data-end=\"1300\"\u003echaincase outer for “OLD model, 1980–2009” Bullets\u003c\/strong\u003e and list Bullet 350, Deluxe, Machismo, Campus, Bullet 500 among confirmed users.\u003c\/p\u003e\n\u003cp data-start=\"1386\" data-end=\"1751\"\u003eThis cover forms the \u003cstrong data-start=\"1407\" data-end=\"1434\"\u003eright-side primary case\u003c\/strong\u003e enclosing the engine sprocket, primary chain and clutch. A damaged or leaking primary cover can cause oil loss, noisy running and poor appearance. Replacing it with a genuine 143907 ensures \u003cstrong data-start=\"1625\" data-end=\"1689\"\u003ecorrect sealing surfaces, screw pattern and imperial threads\u003c\/strong\u003e, avoiding the headaches of mixing inch and metric hardware.\u003c\/p\u003e\n\u003cblockquote data-start=\"1753\" data-end=\"1962\"\u003e\n\u003cp data-start=\"1755\" data-end=\"1962\"\u003e⚠️ \u003cstrong data-start=\"1758\" data-end=\"1772\"\u003eImportant:\u003c\/strong\u003e 143907 fits \u003cstrong data-start=\"1785\" data-end=\"1845\"\u003eimperial-thread primary chaincases only (pre-March 2002)\u003c\/strong\u003e. Later \u003cstrong data-start=\"1853\" data-end=\"1871\"\u003emetric\/CDI\/TCI\u003c\/strong\u003e and \u003cstrong data-start=\"1876\" data-end=\"1894\"\u003eUCE \/ J-Series\u003c\/strong\u003e engines use different chaincase designs and are \u003cstrong data-start=\"1943\" data-end=\"1961\"\u003enot compatible\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"1964\" data-end=\"1967\"\u003e\n\u003ch3 data-start=\"1969\" data-end=\"1999\"\u003eKey Features \u003c\/h3\u003e\n\u003cul data-start=\"2001\" data-end=\"3116\"\u003e\n\u003cli data-start=\"2001\" data-end=\"2169\"\u003e\n\u003cp data-start=\"2003\" data-end=\"2169\"\u003e\u003cstrong data-start=\"2003\" data-end=\"2052\"\u003eGenuine Royal Enfield primary chaincase outer\u003c\/strong\u003e – OEM part no. \u003cstrong data-start=\"2068\" data-end=\"2078\"\u003e143907\u003c\/strong\u003e, described in RE catalogues as \u003cstrong data-start=\"2110\" data-end=\"2165\"\u003e“CH.CASE FRONT HALF STD \/ Chaincase outer (Inches)”\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2170\" data-end=\"2291\"\u003e\n\u003cp data-start=\"2172\" data-end=\"2291\"\u003eDesigned for \u003cstrong data-start=\"2185\" data-end=\"2218\"\u003ecast-iron \u0026amp; early AVL Bullets\u003c\/strong\u003e with \u003cstrong data-start=\"2224\" data-end=\"2257\"\u003eimperial-thread primary cases\u003c\/strong\u003e produced \u003cstrong data-start=\"2267\" data-end=\"2287\"\u003eup to March 2002\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2292\" data-end=\"2406\"\u003e\n\u003cp data-start=\"2294\" data-end=\"2406\"\u003eForms the \u003cstrong data-start=\"2304\" data-end=\"2349\"\u003efront\/outer half of the primary chaincase\u003c\/strong\u003e, enclosing primary chain, clutch and engine sprocket.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2407\" data-end=\"2550\"\u003e\n\u003cp data-start=\"2409\" data-end=\"2550\"\u003eCorrect \u003cstrong data-start=\"2417\" data-end=\"2452\"\u003ebolt pattern, profile and depth\u003c\/strong\u003e for stock 4-speed primary layout – no cutting, drilling or bracket jugaad on compatible bikes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2551\" data-end=\"2676\"\u003e\n\u003cp data-start=\"2553\" data-end=\"2676\"\u003eOEM-grade pressing and finish for \u003cstrong data-start=\"2587\" data-end=\"2605\"\u003eproper sealing\u003c\/strong\u003e with the matching crankcase-to-chaincase gasket and oil level plug.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2677\" data-end=\"2813\"\u003e\n\u003cp data-start=\"2679\" data-end=\"2813\"\u003eIdeal for restoring \u003cstrong data-start=\"2699\" data-end=\"2748\"\u003eleaking, cracked or over-welded primary cases\u003c\/strong\u003e on old Bullets where oil seepage and misalignment are common.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2971\" data-end=\"3116\"\u003e\n\u003cp data-start=\"2973\" data-end=\"3116\"\u003eSupplied as \u003cstrong data-start=\"2985\" data-end=\"3009\"\u003echaincase outer only\u003c\/strong\u003e – internal components, gaskets and fasteners sold separately, allowing you to reuse good existing parts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3118\" data-end=\"3121\"\u003e\n\u003ch3 data-start=\"3123\" data-end=\"3172\"\u003eCompatibility Table \u003c\/h3\u003e\n\u003cp data-start=\"3174\" data-end=\"3194\"\u003e\u003cstrong data-start=\"3174\" data-end=\"3192\"\u003ePlatform rule:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"3195\" data-end=\"3400\"\u003e\n\u003cli data-start=\"3195\" data-end=\"3295\"\u003e\n\u003cp data-start=\"3197\" data-end=\"3295\"\u003e✅ Fits \u003cstrong data-start=\"3204\" data-end=\"3292\"\u003eCI \/ early AVL models with imperial-thread primary chaincase, built up to March 2002\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3296\" data-end=\"3400\"\u003e\n\u003cp data-start=\"3298\" data-end=\"3400\"\u003e❌ Does \u003cstrong data-start=\"3305\" data-end=\"3312\"\u003enot\u003c\/strong\u003e fit later \u003cstrong data-start=\"3323\" data-end=\"3391\"\u003emetric-thread chaincases, CDI\/TCI-only versions, UCE or J-Series\u003c\/strong\u003e engines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"3402\" data-end=\"3486\"\u003e✅ Confirmed Applications (per RE retired-models catalogue \u0026amp; specialist dealers)\u003c\/h4\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=\"3488\" data-end=\"4806\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"3488\" data-end=\"3610\"\u003e\n\u003ctr data-start=\"3488\" data-end=\"3610\"\u003e\n\u003cth data-start=\"3488\" data-end=\"3527\" data-col-size=\"sm\"\u003eModel \/ Family\u003c\/th\u003e\n\u003cth data-start=\"3527\" data-end=\"3566\" data-col-size=\"sm\"\u003eEngine \/ Gearbox\u003c\/th\u003e\n\u003cth data-start=\"3566\" data-end=\"3593\" data-col-size=\"sm\"\u003eYears (approx.)\u003c\/th\u003e\n\u003cth data-start=\"3593\" data-end=\"3610\" data-col-size=\"lg\"\u003eFitment Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"3733\" data-end=\"4806\"\u003e\n\u003ctr data-start=\"3733\" data-end=\"3919\"\u003e\n\u003ctd data-start=\"3733\" data-end=\"3771\" data-col-size=\"sm\"\u003eBullet 350 Standard (Std)\u003c\/td\u003e\n\u003ctd data-start=\"3771\" data-end=\"3810\" data-col-size=\"sm\"\u003e346cc CI, 4-speed KS\u003c\/td\u003e\n\u003ctd data-start=\"3810\" data-end=\"3836\" data-col-size=\"sm\"\u003eUp to Mar 2002\u003c\/td\u003e\n\u003ctd data-start=\"3836\" data-end=\"3919\" data-col-size=\"lg\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3920\" data-end=\"4075\"\u003e\n\u003ctd data-start=\"3920\" data-end=\"3958\" data-col-size=\"sm\"\u003eBullet 350 Deluxe (Dlx)\u003c\/td\u003e\n\u003ctd data-start=\"3958\" data-end=\"3997\" data-col-size=\"sm\"\u003e346cc CI, 4-speed KS\u003c\/td\u003e\n\u003ctd data-start=\"3997\" data-end=\"4023\" data-col-size=\"sm\"\u003eUp to Mar 2002\u003c\/td\u003e\n\u003ctd data-start=\"4023\" data-end=\"4075\" data-col-size=\"lg\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4076\" data-end=\"4225\"\u003e\n\u003ctd data-start=\"4076\" data-end=\"4114\" data-col-size=\"sm\"\u003eBullet Campus 350 (Cam)\u003c\/td\u003e\n\u003ctd data-start=\"4114\" data-end=\"4153\" data-col-size=\"sm\"\u003e346cc CI, 4-speed KS\u003c\/td\u003e\n\u003ctd data-start=\"4153\" data-end=\"4179\" data-col-size=\"sm\"\u003eUp to Mar 2002\u003c\/td\u003e\n\u003ctd data-start=\"4179\" data-end=\"4225\" data-col-size=\"lg\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4226\" data-end=\"4441\"\u003e\n\u003ctd data-start=\"4226\" data-end=\"4264\" data-col-size=\"sm\"\u003eBullet 500 (Std)\u003c\/td\u003e\n\u003ctd data-start=\"4264\" data-end=\"4303\" data-col-size=\"sm\"\u003e498cc CI, 4-speed KS\u003c\/td\u003e\n\u003ctd data-start=\"4303\" data-end=\"4329\" data-col-size=\"sm\"\u003eUp to Mar 2002\u003c\/td\u003e\n\u003ctd data-start=\"4329\" data-end=\"4441\" data-col-size=\"lg\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4442\" data-end=\"4620\"\u003e\n\u003ctd data-start=\"4442\" data-end=\"4480\" data-col-size=\"sm\"\u003eLightning 500 \/ 535 \/ 535ES\u003c\/td\u003e\n\u003ctd data-start=\"4480\" data-end=\"4519\" data-col-size=\"sm\"\u003e500\/535 CI, 4-speed\u003c\/td\u003e\n\u003ctd data-start=\"4519\" data-end=\"4545\" data-col-size=\"sm\"\u003eUp to Mar 2002\u003c\/td\u003e\n\u003ctd data-start=\"4545\" data-end=\"4620\" data-col-size=\"lg\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"4621\" data-end=\"4806\"\u003e\n\u003ctd data-start=\"4621\" data-end=\"4659\" data-col-size=\"sm\"\u003eThunderbird 350 KS \/ ES (early CI)\u003c\/td\u003e\n\u003ctd data-start=\"4659\" data-end=\"4698\" data-col-size=\"sm\"\u003e346cc CI, 4-speed\u003c\/td\u003e\n\u003ctd data-start=\"4698\" data-end=\"4724\" data-col-size=\"sm\"\u003eLaunch–Mar 2002\u003c\/td\u003e\n\u003ctd data-start=\"4724\" data-end=\"4806\" data-col-size=\"lg\"\u003e\u003cbr\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\u003cp data-start=\"4871\" data-end=\"4938\"\u003e\u003cspan style=\"color: rgb(255, 14, 14);\"\u003e\u003cstrong\u003ePLEASE CHECK PART NUMBER BEFORE PURCHASE \u003c\/strong\u003e\u003c\/span\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 data-start=\"4940\" data-end=\"5846\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"4940\" data-end=\"4998\"\u003e\n\u003ctr data-start=\"4940\" data-end=\"4998\"\u003e\n\u003cth data-start=\"4940\" data-end=\"4977\" data-col-size=\"sm\"\u003eModel \/ Variant\u003c\/th\u003e\n\u003cth data-start=\"4977\" data-end=\"4998\" data-col-size=\"xl\"\u003eEvidence \u0026amp; Status\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"5058\" data-end=\"5846\"\u003e\n\u003ctr data-start=\"5058\" data-end=\"5329\"\u003e\n\u003ctd data-start=\"5058\" data-end=\"5095\" data-col-size=\"sm\"\u003eMachismo 350 \/ Machismo (CI)\u003c\/td\u003e\n\u003ctd data-start=\"5095\" data-end=\"5329\" data-col-size=\"xl\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"5330\" data-end=\"5659\"\u003e\n\u003ctd data-start=\"5330\" data-end=\"5367\" data-col-size=\"sm\"\u003eElectra 4S \/ 5S (CI \/ early LB)\u003c\/td\u003e\n\u003ctd data-start=\"5367\" data-end=\"5659\" data-col-size=\"xl\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"5660\" data-end=\"5846\"\u003e\n\u003ctd data-start=\"5660\" data-end=\"5697\" data-col-size=\"sm\"\u003eMachismo A350 \/ A500 (AVL)\u003c\/td\u003e\n\u003ctd data-start=\"5697\" data-end=\"5846\" data-col-size=\"xl\"\u003e\u003cbr\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\u003ch4 data-start=\"5848\" data-end=\"5874\"\u003e❌ Explicit Exclusions\u003c\/h4\u003e\n\u003cul data-start=\"5876\" data-end=\"6334\"\u003e\n\u003cli data-start=\"5876\" data-end=\"5966\"\u003e\n\u003cp data-start=\"5878\" data-end=\"5966\"\u003eAll \u003cstrong data-start=\"5882\" data-end=\"5889\"\u003eUCE\u003c\/strong\u003e models: Classic 350\/500 UCE, Bullet 350 UCE, Electra UCE, Thunderbird UCE.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"5967\" data-end=\"6046\"\u003e\n\u003cp data-start=\"5969\" data-end=\"6046\"\u003eAll \u003cstrong data-start=\"5973\" data-end=\"5985\"\u003eJ-Series\u003c\/strong\u003e: Classic Reborn, Hunter 350, Meteor 350, new Bullet 350 J.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6047\" data-end=\"6147\"\u003e\n\u003cp data-start=\"6049\" data-end=\"6147\"\u003e\u003cstrong data-start=\"6049\" data-end=\"6062\"\u003e650 Twins\u003c\/strong\u003e (Interceptor \/ Continental GT), Himalayan 411 \/ 450, Scram 411, Guerrilla 450 etc.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6148\" data-end=\"6334\"\u003e\n\u003cp data-start=\"6150\" data-end=\"6334\"\u003eLater \u003cstrong data-start=\"6156\" data-end=\"6192\"\u003emachismo \/ Electra \/ Thunderbird\u003c\/strong\u003e where RE or aftermarket explicitly warn: “not for Machismo, Thunderbird, Electra and other lean burn models” – those use metric\/CDI cases.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"6336\" data-end=\"6339\"\u003e\n\u003ch3 data-start=\"6341\" data-end=\"6353\"\u003eVariants\u003c\/h3\u003e\n\u003cp data-start=\"6355\" data-end=\"6395\"\u003eThis listing covers \u003cstrong data-start=\"6375\" data-end=\"6394\"\u003eone OEM variant\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul data-start=\"6397\" data-end=\"6758\"\u003e\n\u003cli data-start=\"6397\" data-end=\"6424\"\u003e\n\u003cp data-start=\"6399\" data-end=\"6424\"\u003e\u003cstrong data-start=\"6399\" data-end=\"6415\"\u003ePart Number:\u003c\/strong\u003e 143907\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6425\" data-end=\"6502\"\u003e\n\u003cp data-start=\"6427\" data-end=\"6502\"\u003e\u003cstrong data-start=\"6427\" data-end=\"6443\"\u003eDescription:\u003c\/strong\u003e Chaincase outer \/ CH.CASE FRONT HALF STD – inches thread\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6503\" data-end=\"6647\"\u003e\n\u003cp data-start=\"6505\" data-end=\"6647\"\u003e\u003cstrong data-start=\"6505\" data-end=\"6516\"\u003eFinish:\u003c\/strong\u003e Typically polished or painted alloy\/steel primary cover (appearance can vary slightly by production batch; check product photos)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6648\" data-end=\"6710\"\u003e\n\u003cp data-start=\"6650\" data-end=\"6710\"\u003e\u003cstrong data-start=\"6650\" data-end=\"6663\"\u003ePosition:\u003c\/strong\u003e Right side – outer half of primary chaincase\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"6711\" data-end=\"6758\"\u003e\n\u003cp data-start=\"6713\" data-end=\"6758\"\u003e\u003cstrong data-start=\"6713\" data-end=\"6726\"\u003eQuantity:\u003c\/strong\u003e 1N (primary outer cover only)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"6885\" data-end=\"6888\"\u003e\n\u003ch3 data-start=\"6890\" data-end=\"6904\"\u003eFAQs \u003c\/h3\u003e\n\u003cp data-start=\"6906\" data-end=\"7409\"\u003e\u003cstrong data-start=\"6906\" data-end=\"6993\"\u003eQ1. How do I know if my bike needs the “inches” chaincase (143907) or a metric one?\u003c\/strong\u003e\u003cbr data-start=\"6993\" data-end=\"6996\"\u003eIf your Bullet \/ Thunderbird \/ Lightning is \u003cstrong data-start=\"7040\" data-end=\"7058\"\u003epre-March 2002\u003c\/strong\u003e and still running its original primary, it most likely uses \u003cstrong data-start=\"7119\" data-end=\"7157\"\u003eimperial-thread chaincase hardware\u003c\/strong\u003e and in many cases 143907. Later bikes changed to \u003cstrong data-start=\"7207\" data-end=\"7250\"\u003emetric fasteners and CDI-specific cases\u003c\/strong\u003e (e.g., 144917\/4, 145464\/1). The safest check is your \u003cstrong data-start=\"7304\" data-end=\"7352\"\u003eparts book or existing chaincase part number\u003c\/strong\u003e, or measuring the thread of the primary cover screws.\u003c\/p\u003e\n\u003chr data-start=\"7411\" data-end=\"7414\"\u003e\n\u003cp data-start=\"7416\" data-end=\"7896\"\u003e\u003cstrong data-start=\"7416\" data-end=\"7476\"\u003eQ2. Will 143907 fit my Electra \/ Machismo \/ Thunderbird?\u003c\/strong\u003e\u003cbr data-start=\"7476\" data-end=\"7479\"\u003eIt depends on \u003cstrong data-start=\"7493\" data-end=\"7517\"\u003eyear and engine type\u003c\/strong\u003e. RE’s retired catalogue shows 143907 used on several early CI\/AVL variants, but many modern sellers clearly warn that it \u003cstrong data-start=\"7639\" data-end=\"7711\"\u003ewill not fit later lean-burn Electra \/ Machismo \/ Thunderbird models\u003c\/strong\u003e with metric and CDI\/TCI cases. If your bike is post-2002 or labelled “lean burn\/AVL CDI”, treat fitment as \u003cstrong data-start=\"7819\" data-end=\"7831\"\u003eunlikely\u003c\/strong\u003e and confirm with a parts manual or RE dealer before ordering.\u003c\/p\u003e\n\u003chr data-start=\"7898\" data-end=\"7901\"\u003e\n\u003cp data-start=\"7903\" data-end=\"8239\"\u003e\u003cstrong data-start=\"7903\" data-end=\"7977\"\u003eQ3. Does this chaincase outer come with gaskets, oil plugs, or screws?\u003c\/strong\u003e\u003cbr data-start=\"7977\" data-end=\"7980\"\u003eNo. Part \u003cstrong data-start=\"7989\" data-end=\"7999\"\u003e143907\u003c\/strong\u003e is \u003cstrong data-start=\"8003\" data-end=\"8048\"\u003eonly the outer chaincase cover\/front half\u003c\/strong\u003e. You must purchase or reuse the \u003cstrong data-start=\"8081\" data-end=\"8155\"\u003egasket, inspection\/oil filler plugs, fiber washers and mounting screws\u003c\/strong\u003e separately (they carry different part numbers in the primary chaincase diagram).\u003c\/p\u003e\n\u003chr data-start=\"8241\" data-end=\"8244\"\u003e\n\u003cp data-start=\"8246\" data-end=\"8570\"\u003e\u003cstrong data-start=\"8246\" data-end=\"8305\"\u003eQ4. Can I use 143907 on a UCE Bullet or Classic Reborn?\u003c\/strong\u003e\u003cbr data-start=\"8305\" data-end=\"8308\"\u003eNo. UCE and J-Series engines have a completely different \u003cstrong data-start=\"8365\" data-end=\"8413\"\u003eunit-construction primary and gearbox layout\u003c\/strong\u003e, so the old separate chaincase outer will not fit. This part is strictly for \u003cstrong data-start=\"8491\" data-end=\"8534\"\u003eolder CI\/AVL “separate gearbox” Bullets\u003c\/strong\u003e with primary drive on the right.\u003c\/p\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":50771272204583,"sku":null,"price":1600.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/ChatGPTImageDec2_2025_10_22_57PM_abae9c8e-103e-4a18-a851-8e46521b611c.png?v=1764701473","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-143907-chaincase-outer-front-half-bullet-350-500-4-speed","provider":"UNDER THE HOOD","version":"1.0","type":"link"}