{"product_id":"royal-enfield-570888-a-digital-tci-unit-multi-curve-vb51-bullet-500-uce","title":"Royal Enfield 570888\/A – Digital TCI Unit Multi Curve VB51 for Bullet 500 UCE (BS3) – Genuine Ignition CDI for Carb Conversion \u0026 Retrofit","description":"\u003cp data-start=\"261\" data-end=\"677\"\u003eThe \u003cstrong data-start=\"309\" data-end=\"371\"\u003eRoyal Enfield 570888\/A – Digital TCI Unit Multi Curve VB51\u003c\/strong\u003e is the genuine ignition control unit used with the \u003cstrong data-start=\"423\" data-end=\"470\"\u003eVB51 carburettor setup on 500cc UCE engines\u003c\/strong\u003e. Official Royal Enfield price lists clearly describe 570888\/A as \u003cstrong data-start=\"536\" data-end=\"575\"\u003e“DIGITAL TCI UNIT–MULTI CURVE VB51”\u003c\/strong\u003e, confirming it as the factory TCI module for the VB51 system.\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"679\" data-end=\"1144\"\u003e\u003cstrong data-start=\"737\" data-end=\"795\"\u003eDigital TCI Unit for Bullet 500 UCE \/ Bullet 500 BSIII\u003c\/strong\u003e, making it the correct OEM replacement for Bullet 500s that run the VB51 carburettor ignition setup.\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1146\" data-end=\"1592\"\u003eCompared to generic CDI\/TCI units, this \u003cstrong data-start=\"1186\" data-end=\"1210\"\u003emulti-curve VB51 TCI\u003c\/strong\u003e is mapped specifically for 500cc UCE engines with the VB51 carb, giving \u003cstrong data-start=\"1283\" data-end=\"1366\"\u003eclean starting, stable idle, strong mid-range torque, and safer ignition timing\u003c\/strong\u003e under load. It’s ideal if your bike has \u003cstrong data-start=\"1407\" data-end=\"1500\"\u003emisfiring, random cut-off, poor throttle response, or you’re completing a carb conversion\u003c\/strong\u003e on a Bullet\/Classic 500 using genuine parts instead of jugaad wiring and local CDI boxes.\u003c\/p\u003e\n\u003cp data-start=\"1594\" data-end=\"1724\"\u003eIf you’re restoring a Bullet 500 UCE or finalising a VB51 carb conversion, \u003cstrong data-start=\"1669\" data-end=\"1681\"\u003e570888\/A\u003c\/strong\u003e is the ignition brain you should be using.\u003c\/p\u003e\n\u003chr data-start=\"1726\" data-end=\"1729\"\u003e\n\u003ch3 data-start=\"1731\" data-end=\"1754\"\u003eKey Features \u003c\/h3\u003e\n\u003cul data-start=\"1756\" data-end=\"2814\"\u003e\n\u003cli data-start=\"1756\" data-end=\"1883\"\u003e\n\u003cp data-start=\"1758\" data-end=\"1883\"\u003e\u003cstrong data-start=\"1758\" data-end=\"1819\"\u003eGenuine Royal Enfield Digital TCI Unit – Multi Curve VB51\u003c\/strong\u003e (Part No. \u003cstrong data-start=\"1830\" data-end=\"1842\"\u003e570888\/A\u003c\/strong\u003e) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1884\" data-end=\"1970\"\u003e\n\u003cp data-start=\"1886\" data-end=\"1970\"\u003eFactory-specified TCI for \u003cstrong data-start=\"1912\" data-end=\"1968\"\u003eVB51 carburettor ignition setup on 500cc UCE engines\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1971\" data-end=\"2105\"\u003e\n\u003cp data-start=\"1973\" data-end=\"2105\"\u003eConfirmed fitment for \u003cstrong data-start=\"1995\" data-end=\"2032\"\u003eBullet 500 UCE \/ Bullet 500 BSIII\u003c\/strong\u003e from multiple specialist sellers \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2106\" data-end=\"2216\"\u003e\n\u003cp data-start=\"2108\" data-end=\"2216\"\u003e\u003cstrong data-start=\"2108\" data-end=\"2140\"\u003eMulti-curve ignition mapping\u003c\/strong\u003e optimized for torque, smoothness and engine safety under varying load\/RPM\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2217\" data-end=\"2370\"\u003e\n\u003cp data-start=\"2219\" data-end=\"2370\"\u003eWidely used in \u003cstrong data-start=\"2234\" data-end=\"2284\"\u003eClassic 500 EFI-to-carb (VB51) conversion kits\u003c\/strong\u003e along with 570889\/B carb and 570886\/B adaptor \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2371\" data-end=\"2487\"\u003e\n\u003cp data-start=\"2373\" data-end=\"2487\"\u003eReplaces weak, fake or incompatible CDI\/TCI boxes that cause \u003cstrong data-start=\"2434\" data-end=\"2485\"\u003emisfire, knocking, flat spots and hard starting\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2488\" data-end=\"2600\"\u003e\n\u003cp data-start=\"2490\" data-end=\"2600\"\u003ePlug-and-play with the correct VB51 wiring harness and flywheel—no cutting or splicing when used as designed\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2601\" data-end=\"2707\"\u003e\n\u003cp data-start=\"2603\" data-end=\"2707\"\u003eOEM-grade electronics for \u003cstrong data-start=\"2629\" data-end=\"2683\"\u003econsistent spark, long life and better reliability\u003c\/strong\u003e than aftermarket CDIs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2708\" data-end=\"2814\"\u003e\n\u003cp data-start=\"2710\" data-end=\"2814\"\u003eIdeal for \u003cstrong data-start=\"2720\" data-end=\"2814\"\u003eengine rebuilds, carb conversions, touring builds and high-reliability Bullet 500 projects\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2816\" data-end=\"2819\"\u003e\n\u003ch3 data-start=\"2821\" data-end=\"2860\"\u003eCompatibility Table\u003c\/h3\u003e\n\u003cp data-start=\"2862\" data-end=\"2955\"\u003e\u003cstrong data-start=\"2862\" data-end=\"2880\"\u003eCore platform:\u003c\/strong\u003e 499cc \u003cstrong data-start=\"2887\" data-end=\"2905\"\u003eBullet 500 UCE\u003c\/strong\u003e, VB51 carb-based ignition system (primarily BS3).\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=\"2957\" data-end=\"3793\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"2957\" data-end=\"3102\"\u003e\n\u003ctr data-start=\"2957\" data-end=\"3102\"\u003e\n\u003cth data-start=\"2957\" data-end=\"2979\" data-col-size=\"sm\"\u003eModel Name\u003c\/th\u003e\n\u003cth data-start=\"2979\" data-end=\"3003\" data-col-size=\"sm\"\u003eEngine Type\u003c\/th\u003e\n\u003cth data-start=\"3003\" data-end=\"3014\" data-col-size=\"sm\"\u003eBS Stage\u003c\/th\u003e\n\u003cth data-start=\"3014\" data-end=\"3038\" data-col-size=\"sm\"\u003eApprox. Years (India)\u003c\/th\u003e\n\u003cth data-start=\"3038\" data-end=\"3092\" data-col-size=\"xl\"\u003eNotes \/ Usage\u003c\/th\u003e\n\u003cth data-start=\"3092\" data-end=\"3102\" data-col-size=\"sm\"\u003eStatus\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"3250\" data-end=\"3793\"\u003e\n\u003ctr data-start=\"3250\" data-end=\"3461\"\u003e\n\u003ctd data-start=\"3250\" data-end=\"3272\" data-col-size=\"sm\"\u003eBullet 500 UCE\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3272\" data-end=\"3296\"\u003e499cc UCE (carb\/VB51)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3296\" data-end=\"3307\"\u003eBS3\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3307\" data-end=\"3332\"\u003e~2010–2016\u003c\/td\u003e\n\u003ctd data-col-size=\"xl\" data-start=\"3332\" data-end=\"3446\"\u003eListed as Digital TCI Unit for Bullet 500 UCE \/ BSIII by multiple sellers\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3446\" data-end=\"3461\"\u003e✔ Confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"3462\" data-end=\"3793\"\u003e\n\u003ctd data-start=\"3462\" data-end=\"3503\" data-col-size=\"sm\"\u003eClassic 500 UCE EFI (VB51 conversions)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3503\" data-end=\"3534\"\u003e499cc UCE EFI (from factory)\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3534\" data-end=\"3544\"\u003eBS3\/BS4\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3544\" data-end=\"3557\"\u003e~2009–2020\u003c\/td\u003e\n\u003ctd data-col-size=\"xl\" data-start=\"3557\" data-end=\"3768\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"3768\" data-end=\"3793\"\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=\"4175\" data-end=\"4271\"\u003eCHECK PART NUMBER BEFORE PURCHASE\u003c\/p\u003e\n\u003chr data-start=\"4273\" data-end=\"4276\"\u003e\n\u003ch3 data-start=\"4278\" data-end=\"4290\"\u003eVariants\u003c\/h3\u003e\n\u003cul data-start=\"4292\" data-end=\"4439\"\u003e\n\u003cli data-start=\"4292\" data-end=\"4439\"\u003e\n\u003cp data-start=\"4294\" data-end=\"4315\"\u003e\u003cstrong data-start=\"4294\" data-end=\"4313\"\u003eSingle Variant:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"4318\" data-end=\"4439\"\u003e\n\u003cli data-start=\"4318\" data-end=\"4439\"\u003e\n\u003cp data-start=\"4320\" data-end=\"4439\"\u003eRoyal Enfield \u003cstrong data-start=\"4334\" data-end=\"4382\"\u003e570888\/A – Digital TCI Unit Multi Curve VB51\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4476\" data-end=\"4479\"\u003e\n\u003ch3 data-start=\"4481\" data-end=\"4495\"\u003eFAQs\u003c\/h3\u003e\n\u003cp data-start=\"4497\" data-end=\"4836\"\u003e\u003cstrong data-start=\"4497\" data-end=\"4568\"\u003eQ1. Will this directly replace the ECU on my stock Classic 500 EFI?\u003c\/strong\u003e\u003cbr data-start=\"4568\" data-end=\"4571\"\u003eNo. Stock Classic 500 EFI uses an \u003cstrong data-start=\"4605\" data-end=\"4612\"\u003eECU\u003c\/strong\u003e, not this VB51 TCI. \u003cstrong data-start=\"4633\" data-end=\"4675\"\u003e570888\/A is for VB51 carb-based setups\u003c\/strong\u003e (e.g., Bullet 500 UCE BS3, or C5 conversions). For EFI bikes, you must use the correct ECU part number (e.g., 592861\/B). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"4838\" data-end=\"5094\"\u003e\u003cstrong data-start=\"4838\" data-end=\"4892\"\u003eQ2. Which bike is this confirmed for from factory?\u003c\/strong\u003e\u003cbr data-start=\"4892\" data-end=\"4895\"\u003eThis unit is confirmed for \u003cstrong data-start=\"4922\" data-end=\"4959\"\u003eBullet 500 UCE \/ Bullet 500 BSIII\u003c\/strong\u003e as a digital TCI unit, listed by multiple OEM-focused vendors and generic export catalogues. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"5096\" data-end=\"5466\"\u003e\u003cstrong data-start=\"5096\" data-end=\"5161\"\u003eQ3. Is it suitable for EFI-to-carb conversion on Classic 500?\u003c\/strong\u003e\u003cbr data-start=\"5161\" data-end=\"5164\"\u003eYes, most serious C5 500 EFI-to-carb conversion guides include \u003cstrong data-start=\"5227\" data-end=\"5239\"\u003e570888\/A\u003c\/strong\u003e as the matching \u003cstrong data-start=\"5256\" data-end=\"5273\"\u003eVB51 TCI unit\u003c\/strong\u003e alongside the VB51 carb and flywheel. It should be installed only as part of a properly wired conversion with the correct harness and charging system. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"5468\" data-end=\"5739\"\u003e\u003cstrong data-start=\"5468\" data-end=\"5521\"\u003eQ4. Do I need any programming or mapping changes?\u003c\/strong\u003e\u003cbr data-start=\"5521\" data-end=\"5524\"\u003eNo. This is a \u003cstrong data-start=\"5538\" data-end=\"5564\"\u003epre-mapped digital TCI\u003c\/strong\u003e—no user programming required. Just ensure all other components (stator, flywheel, coil, wiring) match the VB51 system specification. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"5741\" data-end=\"6059\"\u003e\u003cstrong data-start=\"5741\" data-end=\"5823\"\u003eQ5. My bike has random misfires and cut-offs. Will changing only the TCI help?\u003c\/strong\u003e\u003cbr data-start=\"5823\" data-end=\"5826\"\u003eIf your existing TCI is weak\/fake or mismatched, replacing it with a genuine \u003cstrong data-start=\"5903\" data-end=\"5915\"\u003e570888\/A\u003c\/strong\u003e often cures misfire and cut-off issues—but you should also check \u003cstrong data-start=\"5981\" data-end=\"6032\"\u003ewiring harness, coil, plug, and charging system\u003c\/strong\u003e to avoid recurring faults.\u003c\/p\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":50681175212327,"sku":null,"price":1060.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/C15F85CD-BE56-4E83-AD31-78D74AC13673.jpg?v=1763204245","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-570888-a-digital-tci-unit-multi-curve-vb51-bullet-500-uce","provider":"UNDER THE HOOD","version":"1.0","type":"link"}