{"product_id":"mikuni-large-round-main-jets-4-pk-145-134-7145","title":"Mikuni Large Round Main Jets - 4\/PK #145","description":"\u003cp\u003eGenuine Mikuni large round main jets in size #145, sold in a 4-pack for carburetor tuning on V-twin motorcycles. Mikuni jets meter fuel precisely during mid-to-full throttle cruising and acceleration.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eSize #145 main jet\u003c\/li\u003e\n  \u003cli\u003e4-pack quantity\u003c\/li\u003e\n  \u003cli\u003eGenuine Mikuni OEM part\u003c\/li\u003e\n  \u003cli\u003eLarge round head design\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 FN100604-145\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. Verify your current jet size before ordering to ensure correct tuning.\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 during mid-range and full-throttle operation. Larger numbers allow more fuel; smaller numbers lean out the mixture.\u003c\/p\u003e\n\u003ch3\u003eHow do I know if I need a #145 jet?\u003c\/h3\u003e\n\u003cp\u003eCheck your carb's current jet size or consult your motorcycle's tuning guide. Jetting depends on altitude, air temperature, and modifications.\u003c\/p\u003e\n\u003ch3\u003eAre these genuine Mikuni parts?\u003c\/h3\u003e\n\u003cp\u003eYes — these are OEM Mikuni jets distributed by Western Power Sports.\u003c\/p\u003e\n\u003ch3\u003eDo I need any special tools to install?\u003c\/h3\u003e\n\u003cp\u003eA carburetor removal kit and screwdrivers help access the float bowl where the main jet is located. Some bikes require partial engine cover removal.\u003c\/p\u003e","brand":"Mikuni","offers":[{"title":"Default Title","offer_id":53034991911023,"sku":"134-7145","price":20.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_c9322ee3-7e05-496d-adf0-89433659f925.png?v=1779558739","url":"https:\/\/vtwinbikers.com\/products\/mikuni-large-round-main-jets-4-pk-145-134-7145","provider":"Vtwinbikers","version":"1.0","type":"link"}