{"product_id":"tbparts-big-valve-kit-honda-grom-monkey-msx-125-2021-older","title":"TBParts Big Valve Kit – Honda Grom, Monkey \u0026 MSX 125 (2021 \u0026 Older)","description":"\u003ch2\u003eTBParts Big Valve Kit – Honda Grom, Monkey \u0026amp; MSX 125 (2021 \u0026amp; Older)\u003c\/h2\u003e\n\u003cp\u003eMaximize airflow and unlock more power from your Honda Grom, Monkey 125, or MSX 125 with the \u003cstrong\u003eTBParts Big Valve Kit\u003c\/strong\u003e. Featuring a \u003cstrong\u003e+1.5mm oversized intake valve\u003c\/strong\u003e and a \u003cstrong\u003e+0.5mm oversized exhaust valve\u003c\/strong\u003e, this kit is engineered to outperform the factory valves in every measurable way — more flow, more strength, and less weight.\u003c\/p\u003e\n\u003cp\u003eBoth valves are machined from \u003cstrong\u003eEV8 stainless steel\u003c\/strong\u003e, a premium alloy that delivers superior heat resistance and longevity over OEM valves. The redesigned valve profiles improve flow characteristics for real-world power gains, while the lighter construction reduces valve float — allowing the engine to rev higher and faster while freeing up horsepower previously spent moving heavier stock valves.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e+1.5mm oversized intake valve for increased airflow and power\u003c\/li\u003e\n\u003cli\u003e+0.5mm oversized exhaust valve for improved scavenging\u003c\/li\u003e\n\u003cli\u003eEV8 stainless steel construction — stronger and longer-lasting than OEM\u003c\/li\u003e\n\u003cli\u003eLighter than factory valves — reduces valve float and frees up horsepower\u003c\/li\u003e\n\u003cli\u003eRedesigned valve profiles for superior flow characteristics\u003c\/li\u003e\n\u003cli\u003eDirect upgrade for stock cylinder head (valve seat cutting required)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMake:\u003c\/strong\u003e Honda\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModels:\u003c\/strong\u003e Grom 125 (MSX125), Monkey 125\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYears:\u003c\/strong\u003e 2021 and older only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePart Number\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTBParts PN:\u003c\/strong\u003e TBW1042\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Note\u003c\/h3\u003e\n\u003cp\u003eThis kit requires professional installation by a qualified mechanic or machine shop. \u003cstrong\u003eValve seats must be cut\u003c\/strong\u003e to accept the larger valve head diameters, and valves must be sunk to the correct depth to maintain proper overlap clearances. Refer to the TBParts installation spec sheets for protrusion and install height specifications before beginning work.\u003c\/p\u003e","brand":"TBParts","offers":[{"title":"Default Title","offer_id":43243734597873,"sku":"TBW1042","price":69.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/1348\/7857\/products\/tbparts-engine-default-title-tb-big-valve-kit-honda-125cc-monkey-grom-msx-tbw1042-34597873-30412656050417.webp?v=1773628742","url":"https:\/\/howlingmoto.com\/products\/tbparts-big-valve-kit-honda-grom-monkey-msx-125-2021-older","provider":"Howling Moto","version":"1.0","type":"link"}