{"product_id":"dhm-performance-ecu-reflash-honda-grom-monkey-2014-2020","title":"DHM Performance ECU Reflash – Honda Grom \u0026 Monkey (2014–2020)","description":"\u003cp\u003e\u003cstrong\u003eMail-in ECU turnaround: 1–2 business days.\u003c\/strong\u003e After checkout you’ll receive shipping instructions and a link to submit your exact modifications — every tune is built specifically for your setup.\u003c\/p\u003e\u003ch2\u003eDHM ECU Reflash – Honda Grom \u0026amp; Monkey (2014–2020)\u003c\/h2\u003e\u003cp\u003eThe original and most trusted ECU flash tuning solution for the Honda Grom and Monkey. DHMotoring has tuned over 10,000 ECUs and holds maps for virtually every intake, exhaust, and cam combination on the market. No piggyback controller needed — just a cleaner, safer, more powerful tune on your stock ECU.\u003c\/p\u003e\u003cp\u003eStock Groms run dangerously lean at high RPM, capping out around 6–7 HP at 9,200 rpm. DHM’s reflash corrects the air\/fuel ratio, advances ignition timing, and raises the rev limit — unlocking up to 3 additional HP at high RPM while keeping OEM-like driveability and reliability.\u003c\/p\u003e\u003ch3\u003ePerformance Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUp to \u003cstrong\u003e+3 HP\u003c\/strong\u003e at high RPM vs. an untuned ECU\u003c\/li\u003e\n\u003cli\u003eRaised rev limit to \u003cstrong\u003e10,000 rpm\u003c\/strong\u003e (stock: 9,250 rpm) — higher limits available on request\u003c\/li\u003e\n\u003cli\u003eCorrected air\/fuel ratio for safer engine operation\u003c\/li\u003e\n\u003cli\u003eAdditional ignition timing advance for improved throttle response\u003c\/li\u003e\n\u003cli\u003eRevised fuel injection timing for better atomization\u003c\/li\u003e\n\u003cli\u003eImproved mid-range torque and top speed\u003c\/li\u003e\n\u003cli\u003eOptional tip-sensor delete\u003c\/li\u003e\n\u003cli\u003eOptional cold-start high idle delete\u003c\/li\u003e\n\u003cli\u003eOptional closed-loop delete (allows piggyback controllers to modify the full map)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAvailable Tune Stages\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Only\u003c\/strong\u003e — Optimized for bikes running an aftermarket exhaust only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Only\u003c\/strong\u003e — Optimized for bikes running an aftermarket intake only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 1: Intake \u0026amp; Exhaust\u003c\/strong\u003e — For bikes with aftermarket intake and exhaust\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 2: Intake, Exhaust \u0026amp; Cam\u003c\/strong\u003e — Adds camshaft tuning on top of Stage 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 3: High Comp Piston, Intake, Exhaust \u0026amp; Cam\u003c\/strong\u003e — Full bolt-on performance tune\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCore ECU Options\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSend your ECU in\u003c\/strong\u003e — Flash and return within 1–2 business days\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOG Core (2014–2015)\u003c\/strong\u003e — Pre-flashed core ECU; return your stock unit for a $50 refund\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSF Core (2017–2020)\u003c\/strong\u003e — Pre-flashed core ECU; return your stock unit for a $50 refund\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonkey Core (2018–2021)\u003c\/strong\u003e — Pre-flashed core ECU; return your stock unit for a $50 refund\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFuture Updates\u003c\/h3\u003e\u003cp\u003eIf DHM revises your current setup’s tune, your ECU will be updated for free (you pay shipping both ways). Upgrading to a different setup (big bore, new cam, etc.) is only a \u003cstrong\u003e$35 fee\u003c\/strong\u003e, including return shipping.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRunning a big bore kit?\u003c\/strong\u003e See our \u003ca href=\"https:\/\/howlingmoto.com\/products\/dhm-186cc-ecu-reflash-service\"\u003eDHM 186cc ECU Reflash\u003c\/a\u003e instead.\u003c\/p\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHonda Grom OG (2014–2015)\u003c\/li\u003e\n\u003cli\u003eHonda Grom SF (2017–2020)\u003c\/li\u003e\n\u003cli\u003eHonda Monkey 1st Gen (2018–2021)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DHMotoring","offers":[{"title":"Exhaust Only \/ I will be sending my ECU to be Flashed","offer_id":47582951604465,"sku":null,"price":105.0,"currency_code":"USD","in_stock":true},{"title":"Exhaust Only \/ I require a 2014-2015 OG Core","offer_id":47582951637233,"sku":null,"price":390.07,"currency_code":"USD","in_stock":true},{"title":"Exhaust Only \/ I require a 2017-2020 SF Core","offer_id":47582951670001,"sku":null,"price":105.0,"currency_code":"USD","in_stock":true},{"title":"Exhaust Only \/ I require a Monkey Core 2018-2021","offer_id":47582951702769,"sku":null,"price":273.85,"currency_code":"USD","in_stock":true},{"title":"Intake Only \/ I will be sending my ECU to be Flashed","offer_id":47582951735537,"sku":null,"price":105.0,"currency_code":"USD","in_stock":true},{"title":"Intake Only \/ I require a 2014-2015 OG Core","offer_id":47582951768305,"sku":null,"price":390.07,"currency_code":"USD","in_stock":true},{"title":"Intake Only \/ I require a 2017-2020 SF Core","offer_id":47582951801073,"sku":null,"price":252.6,"currency_code":"USD","in_stock":true},{"title":"Intake Only \/ I require a Monkey Core 2018-2021","offer_id":47582951833841,"sku":null,"price":273.85,"currency_code":"USD","in_stock":true},{"title":"Stage 1: Intake and Exhaust \/ I will be sending my ECU to be Flashed","offer_id":43181675249905,"sku":"DHM-ECU-RE-STG1-N","price":105.0,"currency_code":"USD","in_stock":true},{"title":"Stage 1: Intake and Exhaust \/ I require a 2014-2015 OG Core","offer_id":43181675282673,"sku":"DHM-ECU-RE-STG1-YOG","price":390.03,"currency_code":"USD","in_stock":true},{"title":"Stage 1: Intake and Exhaust \/ I require a 2017-2020 SF Core","offer_id":43181675315441,"sku":"DHM-ECU-RE-STG1-YSF","price":252.6,"currency_code":"USD","in_stock":true},{"title":"Stage 1: Intake and Exhaust \/ I require a Monkey Core 2018-2021","offer_id":43181675348209,"sku":"DHM-ECU-RE-STG1-YM","price":273.85,"currency_code":"USD","in_stock":true},{"title":"Stage 2: Intake Exhaust and Cam \/ I will be sending my ECU to be Flashed","offer_id":43181675380977,"sku":"DHM-ECU-RE-STG2-N","price":105.0,"currency_code":"USD","in_stock":true},{"title":"Stage 2: Intake Exhaust and Cam \/ I require a 2014-2015 OG Core","offer_id":43181675413745,"sku":"DHM-ECU-RE-STG2-YOG","price":390.07,"currency_code":"USD","in_stock":true},{"title":"Stage 2: Intake Exhaust and Cam \/ I require a 2017-2020 SF Core","offer_id":43181675446513,"sku":"DHM-ECU-RE-STG2-YSF","price":252.6,"currency_code":"USD","in_stock":true},{"title":"Stage 2: Intake Exhaust and Cam \/ I require a Monkey Core 2018-2021","offer_id":43181675479281,"sku":"DHM-ECU-RE-STG2-YM","price":273.85,"currency_code":"USD","in_stock":true},{"title":"Stage 3: High Comp Piston Intake Exhaust and Cam \/ I will be sending my ECU to be Flashed","offer_id":43181675512049,"sku":"DHM-ECU-RE-STG3-N","price":105.0,"currency_code":"USD","in_stock":true},{"title":"Stage 3: High Comp Piston Intake Exhaust and Cam \/ I require a 2014-2015 OG Core","offer_id":43181675544817,"sku":"DHM-ECU-RE-STG3-YOG","price":252.6,"currency_code":"USD","in_stock":true},{"title":"Stage 3: High Comp Piston Intake Exhaust and Cam \/ I require a 2017-2020 SF Core","offer_id":43181675577585,"sku":"DHM-ECU-RE-STG3-YSF","price":252.6,"currency_code":"USD","in_stock":true},{"title":"Stage 3: High Comp Piston Intake Exhaust and Cam \/ I require a Monkey Core 2018-2021","offer_id":43181675610353,"sku":"DHM-ECU-RE-STG3-YM","price":273.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/1348\/7857\/products\/dhmotoring-tuning-exhaust-only-i-will-be-sending-my-ecu-to-be-flashed-dhm-ecu-reflash-for-honda-grom-monkey-2014-2020-dhm-ecu-re-stg1-n-51604465-29290018767089.jpg?v=1773628654","url":"https:\/\/howlingmoto.com\/products\/dhm-performance-ecu-reflash-honda-grom-monkey-2014-2020","provider":"Howling Moto","version":"1.0","type":"link"}