{"product_id":"mikuni-large-round-main-jets-4-pk-137-5-134-71375","title":"Mikuni Large Round Main Jets - 4\/PK #137.5","description":"\u003cp\u003eMikuni large round main jets in size #137.5, sold as a 4-pack for carburetor tuning on V-twin motorcycles. These genuine Mikuni jets dial in fuel delivery to match engine modifications and riding conditions.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e4-pack quantity\u003c\/li\u003e\n  \u003cli\u003eGenuine Mikuni large round design\u003c\/li\u003e\n  \u003cli\u003eSize #137.5 main jet\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 FN100604-137.5\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 equipped with Mikuni carburetors requiring a #137.5 main jet.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat size jet do I need for my bike?\u003c\/h3\u003e\n\u003cp\u003eJet sizing depends on your engine displacement, carburetor model, altitude, and modifications. Consult your carb manual or a tuning specialist to confirm #137.5 is correct.\u003c\/p\u003e\n\u003ch3\u003eWhy buy a 4-pack?\u003c\/h3\u003e\n\u003cp\u003eFour jets let you experiment with jetting changes, keep spares, or outfit multiple carburetors on a twin-carb setup.\u003c\/p\u003e\n\u003ch3\u003eAre these OEM Mikuni parts?\u003c\/h3\u003e\n\u003cp\u003eYes — genuine Mikuni manufacturer parts, not aftermarket copies.\u003c\/p\u003e\n\u003ch3\u003eHow do I install main jets?\u003c\/h3\u003e\n\u003cp\u003eMain jets screw into the carburetor bowl. The carb must be removed and partially disassembled. If unfamiliar with carburetor work, have a shop handle installation.\u003c\/p\u003e","brand":"Mikuni","offers":[{"title":"Default Title","offer_id":53034991845487,"sku":"134-71375","price":71000.0,"currency_code":"COP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_164a3b17-436a-488f-8b8d-7e97f387b8ba.png?v=1779558739","url":"https:\/\/vtwinbikers.com\/en-co\/products\/mikuni-large-round-main-jets-4-pk-137-5-134-71375","provider":"Vtwinbikers","version":"1.0","type":"link"}