{"product_id":"main-jet-107-si-carbs-for-scooters-mopeds","title":"Main Jet #107, SI Carbs for Scooters \u0026 Mopeds","description":"\u003ch2\u003eMain Jet #107 for SI Carburetors in Scooters and Mopeds\u003c\/h2\u003e\u003cp\u003eThe Main Jet #107 is a key part of SI carburetors and turns up in a range of scooters and mopeds. It controls how much fuel reaches the engine, which helps it run as it should. It is one of the \u003ca href=\"\/collections\/scooter-carburetors\"\u003escooter carburetors \u0026amp; jets\u003c\/a\u003e that you can swap out when tuning. This jet is generally a good match for vintage Vespa engines, especially those that call for jets in the 85-116 size range.\u003c\/p\u003e\u003ch3\u003eWhat the Jet Numbers Mean\u003c\/h3\u003e\u003cp\u003eJets are sold in sizes from 82 to 165. The number you pick changes how much fuel gets through: a higher number lets more fuel flow. Riders sometimes modify their engines for more power, and that can mean moving to a larger jet to supply the extra fuel the engine uses.\u003c\/p\u003e\u003ch3\u003eSigns It May Be Time to Swap the Main Jet\u003c\/h3\u003e\u003cp\u003eA main jet change is commonly done during carburetor tuning or when fuel delivery seems off. Getting the jetting right often takes some trial and error before the engine performs the way you want, so it is a routine job for anyone looking after their scooter or moped.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 107\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Bottom of main jet stack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Si carburetors (main jet size 107, bottom of main jet stack)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Pick the #107 main jet only when your carburetor's main jet stack holds a jet at the bottom and your tuning requires size 107. Available jets run from 82 to 165.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\u003c\/strong\u003e \u003ca href=\"\/collections\/scooter-carburetors\"\u003eScooter Carburetors \u0026amp; Jets\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51138626355257,"sku":"TT-26452","price":3.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/main-jet-107-si-carbs-1.jpg?v=1794376441","url":"https:\/\/www.trendtimes.com\/products\/main-jet-107-si-carbs-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}