{"product_id":"idle-jet-50-120-for-si-carbs-for-scooters-mopeds","title":"Idle Jet (50\/120) for SI Carbs for Scooters \u0026 Mopeds","description":"\u003ch2\u003eIdle Jet for SI Carbs in Scooters and Mopeds\u003c\/h2\u003e\u003cp\u003eThe 50\/120 Idle Jet is made for SI carburetors found on a range of scooters and mopeds. It controls the fuel and air blend across the lower third of the throttle travel. As one of the \u003ca href=\"\/collections\/scooter-carburetors\"\u003escooter carburetors \u0026amp; jets\u003c\/a\u003e available, it has a noticeable effect on how quickly the machine picks up speed. Choosing the right size helps avoid hesitation during acceleration and keeps throttle response smooth.\u003c\/p\u003e\u003ch3\u003eHow the Idle Jet Works\u003c\/h3\u003e\u003cp\u003eThis smaller jet sits beside the main jet stack and meters fuel and air when the throttle is only partly open. It also works alongside the main jet to control the mid-throttle range. An idle jet that doesn't match the bore specification can cause running problems, so sizing by bore is important.\u003c\/p\u003e\u003ch3\u003eReading Jet Sizes\u003c\/h3\u003e\u003cp\u003eEach idle jet is marked with two numbers. The first is the fuel bore, and the second is the air bore. A 50\/120 passes less air than a 50\/140, which produces a richer mixture. Certain vintage Vespas use plugged idle jets, meaning they have no air hole, and these come in set sizes.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 50\/120\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Beside the main jet stack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e SI carburetors on scooters and mopeds, idle jet size 50\/120\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Check the marking on your existing idle jet. This listing is for 50\/120, where the first number is the fuel bore and the second is the air bore.\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":51138577039417,"sku":"TT-26200","price":5.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/idle-jet-50-120-for-si-carbs-1.png?v=1794376073","url":"https:\/\/www.trendtimes.com\/products\/idle-jet-50-120-for-si-carbs-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}