{"product_id":"dhm-186cc-big-bore-kit-all-inclusive-honda-grom-engine-upgrade","title":"DHM 186cc Big Bore Kit – All-Inclusive Honda Grom Engine Upgrade","description":"\u003cp\u003e\u003cstrong\u003eNow shipping within 2 weeks from order date!\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eDHM 186cc All-Inclusive Big Bore Kit – Honda Grom\u003c\/h2\u003e\u003cp\u003eStop piecing together expensive parts. The DHM 186 Big Bore Kit is the first truly all-inclusive big bore package for the Honda Grom — everything you need to transform your stock 125cc into a 186cc powerhouse, assembled and prepped by the same team that builds race engines for a living.\u003c\/p\u003e\u003cp\u003eUsing TBParts hardware, an OEM Honda PCX150 fuel injector, and DHM's proprietary ECU reflash, this kit delivers a reliable, dyno-proven power gain that makes the Grom faster, more fun, and completely streetable.\u003c\/p\u003e\u003ch3\u003ePerformance Numbers\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e16.5 HP \u0026amp; 14.5 ft-lbs of torque\u003c\/strong\u003e — a 74% HP gain and 67% torque gain over stock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20–50 mph in 5 seconds\u003c\/strong\u003e vs. 9 seconds stock\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e186cc Cylinder and Piston (rings pre-aligned and installed)\u003c\/li\u003e\n\u003cli\u003eComplete Oil Cooler Kit\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/howlingmoto.com\/products\/pcx-150-injector\"\u003eOEM Honda PCX150 Fuel Injector\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eDHM ECU Reflash (send-in or core ECU options available)\u003c\/li\u003e\n\u003cli\u003eTB Camshaft (optional — deselect if you already own one)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuild Options\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTB Camshaft:\u003c\/strong\u003e Required for this kit. Deselect if you already own a TB or DCR R2 cam to save on cost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eECU Reflash:\u003c\/strong\u003e Send in your stock ECU or order a pre-flashed core ECU. Core ECU customers receive a $75 refund upon returning their original. Available for SF Grom (2017+), OG Grom (2014–2015), and Monkey (2019–2021).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTB Clutch Kit:\u003c\/strong\u003e Optional $40 upgrade for harder clutch engagement or worn stock clutches.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHow the ECU Reflash Works\u003c\/h3\u003e\u003cp\u003eYour stock narrowband O2 sensor must be installed and plugged in. The ECU will self-learn and adapt over the first 15–20 miles. Since we reflash the OEM ECU, you can still run piggyback fuel controllers (PCV, etc.) on top for further tuning — giving you a better base than an unmodified stock ECU.\u003c\/p\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHonda Grom SF (2017+)\u003c\/li\u003e\n\u003cli\u003eHonda Grom OG (2014–2015)\u003c\/li\u003e\n\u003cli\u003eHonda Monkey (2019–2021)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eRecommended (not required):\u003c\/strong\u003e Upgraded intake and exhaust. For regular highway use, an oil temperature gauge (OPMID or Koso) is highly recommended to monitor engine heat.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eInstallation instructions are not included. If you are not comfortable working on these engines, professional installation is recommended.\u003c\/em\u003e\u003c\/p\u003e","brand":"DHMotoring","offers":[{"title":"Yes I already own one \/ No I will send mine in to be flashed \/ No thanks","offer_id":43707764703473,"sku":"","price":580.0,"currency_code":"USD","in_stock":false},{"title":"Yes I already own one \/ No I will send mine in to be flashed \/ Yes please include one","offer_id":43707767652593,"sku":"","price":620.0,"currency_code":"USD","in_stock":false},{"title":"Yes I already own one \/ Yes please send a SF (2017+ Grom) \/ No thanks","offer_id":43707767685361,"sku":"","price":675.0,"currency_code":"USD","in_stock":false},{"title":"Yes I already own one \/ Yes please send a SF (2017+ Grom) \/ Yes please include one","offer_id":43707767718129,"sku":"","price":715.0,"currency_code":"USD","in_stock":false},{"title":"Yes I already own one \/ Yes please send an OG (2014-2015) \/ No thanks","offer_id":43707767750897,"sku":"","price":675.0,"currency_code":"USD","in_stock":false},{"title":"Yes I already own one \/ Yes please send an OG (2014-2015) \/ Yes please include one","offer_id":43707767783665,"sku":"","price":715.0,"currency_code":"USD","in_stock":false},{"title":"Yes I already own one \/ Yes please send a Monkey (2019-2021) \/ No thanks","offer_id":43707767816433,"sku":"","price":675.0,"currency_code":"USD","in_stock":false},{"title":"Yes I already own one \/ Yes please send a Monkey (2019-2021) \/ Yes please include one","offer_id":43707767849201,"sku":"","price":715.0,"currency_code":"USD","in_stock":false},{"title":"No I need to purchase one \/ No I will send mine in to be flashed \/ No thanks","offer_id":43707767881969,"sku":"","price":645.0,"currency_code":"USD","in_stock":false},{"title":"No I need to purchase one \/ No I will send mine in to be flashed \/ Yes please include one","offer_id":43707767914737,"sku":"","price":670.0,"currency_code":"USD","in_stock":false},{"title":"No I need to purchase one \/ Yes please send a SF (2017+ Grom) \/ No thanks","offer_id":43707767947505,"sku":"","price":740.0,"currency_code":"USD","in_stock":false},{"title":"No I need to purchase one \/ Yes please send a SF (2017+ Grom) \/ Yes please include one","offer_id":43707767980273,"sku":"","price":785.0,"currency_code":"USD","in_stock":false},{"title":"No I need to purchase one \/ Yes please send an OG (2014-2015) \/ No thanks","offer_id":43707768013041,"sku":"","price":740.0,"currency_code":"USD","in_stock":false},{"title":"No I need to purchase one \/ Yes please send an OG (2014-2015) \/ Yes please include one","offer_id":43707768045809,"sku":"","price":785.0,"currency_code":"USD","in_stock":false},{"title":"No I need to purchase one \/ Yes please send a Monkey (2019-2021) \/ No thanks","offer_id":43707768078577,"sku":"","price":740.0,"currency_code":"USD","in_stock":false},{"title":"No I need to purchase one \/ Yes please send a Monkey (2019-2021) \/ Yes please include one","offer_id":43707768111345,"sku":"","price":785.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/1348\/7857\/products\/dhmotoring-yes-i-already-own-one-no-i-will-send-mine-in-to-be-flashed-no-thanks-dhm-186-all-inclusive-big-bore-kit-64703473-31264552550641.webp?v=1773629169","url":"https:\/\/howlingmoto.com\/products\/dhm-186cc-big-bore-kit-all-inclusive-honda-grom-engine-upgrade","provider":"Howling Moto","version":"1.0","type":"link"}