{"product_id":"mikuni-large-round-main-jets-4-pk-125-134-7125","title":"Mikuni Large Round Main Jets - 4\/PK #125","description":"\u003cp\u003eGenuine Mikuni large round main jets #125, sold in a 4-pack for carburetor tuning on V-twin motorcycles. These jets meter fuel flow at cruise and steady-state throttle positions, allowing riders to dial in the correct air-fuel ratio for their engine and elevation.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e4-pack quantity\u003c\/li\u003e\n  \u003cli\u003eGenuine Mikuni OEM jets\u003c\/li\u003e\n  \u003cli\u003eLarge round body style\u003c\/li\u003e\n  \u003cli\u003e#125 main jet size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mikuni\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e FN100604-125\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJet Size:\u003c\/strong\u003e #125\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 4 per pack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 4.4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 2.2 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 0.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.05 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Japan\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits V-twin motorcycles with Mikuni carburetors using large round main jet bodies.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat does a main jet do?\u003c\/h3\u003e\n\u003cp\u003eThe main jet meters fuel at cruise and steady throttle. Correct sizing ensures proper air-fuel ratio across the midrange and top-end RPM band.\u003c\/p\u003e\n\u003ch3\u003eHow do I know if I need a #125?\u003c\/h3\u003e\n\u003cp\u003eJet sizing depends on engine displacement, altitude, temperature, and carburetor model. Consult your carb tuning guide or Mikuni's recommendations for your specific bike.\u003c\/p\u003e\n\u003ch3\u003eAre these genuine Mikuni parts?\u003c\/h3\u003e\n\u003cp\u003eYes — these are genuine Mikuni OEM jets manufactured in Japan, not aftermarket clones.\u003c\/p\u003e\n\u003ch3\u003eWhy buy a 4-pack?\u003c\/h3\u003e\n\u003cp\u003eHaving a range of jet sizes on hand lets you dial in the perfect air-fuel ratio without waiting for a single jet to ship. Common for riders who tune across seasons or elevations.\u003c\/p\u003e","brand":"Mikuni","offers":[{"title":"Default Title","offer_id":53034991255663,"sku":"134-7125","price":71000.0,"currency_code":"COP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_f08d217e-56ee-4754-a37e-750628dc574f.png?v=1779558734","url":"https:\/\/vtwinbikers.com\/en-co\/products\/mikuni-large-round-main-jets-4-pk-125-134-7125","provider":"Vtwinbikers","version":"1.0","type":"link"}