{"product_id":"koso-north-america-170cc-big-bore-cylinder-head-kit-for-honda-grom","title":"Koso North America 170cc Big Bore Cylinder\/Head Kit for Honda Grom","description":"\u003cp\u003eReady to wake up your Grom? The \u003cstrong\u003eKoso North America 170cc Big Bore Cylinder\/Head Kit\u003c\/strong\u003e is the definitive displacement upgrade for Honda Grom riders who want real, measurable power gains without sacrificing reliability. Drop the stock 125cc limitations and step up to a purpose-built 170cc setup engineered for performance from the ground up.\u003c\/p\u003e\u003cp\u003eThe centerpiece is a \u003cstrong\u003eunique four-valve cylinder head\u003c\/strong\u003e that dramatically improves airflow over the OEM two-valve design — more air in, more power out. Paired with a \u003cstrong\u003eforged piston\u003c\/strong\u003e for superior strength and heat resistance, this kit is built to handle the demands of spirited street riding, track days, and everything in between.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e170cc displacement — significant power and torque increase over stock 125cc\u003c\/li\u003e\n\u003cli\u003eFour-valve cylinder head design for improved airflow and combustion efficiency\u003c\/li\u003e\n\u003cli\u003eForged piston for enhanced durability and heat resistance\u003c\/li\u003e\n\u003cli\u003eStainless steel 24mm intake valves\u003c\/li\u003e\n\u003cli\u003eStainless steel 20mm exhaust valves\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on fitment — no case splitting required\u003c\/li\u003e\n\u003cli\u003eCompatible with OG Grom, SF Grom, and 1st Gen Monkey\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHonda Grom (OG \/ MSX125) — All Years\u003c\/li\u003e\n\u003cli\u003eHonda Grom (SF) — All Years\u003c\/li\u003e\n\u003cli\u003eHonda Monkey (1st Gen \/ 125) — All Years\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e MB623003 | \u003cstrong\u003eWeight:\u003c\/strong\u003e 5 lbs\u003c\/p\u003e","brand":"Koso North America","offers":[{"title":"Default Title","offer_id":43270327337201,"sku":"MB623003","price":1299.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/1348\/7857\/products\/koso-north-america-engine-default-title-koso-north-america-170cc-big-bore-cylinder-head-kit-for-honda-grom-mb623003-27337201-30448700129521.jpg?v=1773628794","url":"https:\/\/howlingmoto.com\/products\/koso-north-america-170cc-big-bore-cylinder-head-kit-for-honda-grom","provider":"Howling Moto","version":"1.0","type":"link"}