{"product_id":"main-jet-122-si-carbs-for-scooters-mopeds","title":"Main Jet #122, SI Carbs for Scooters \u0026 Mopeds","description":"\u003ch2\u003eMain Jet #122 for Vespa and Other Scooters\u003c\/h2\u003e\u003cp\u003eThe Main Jet #122 suits large frame SI carburetors used across a variety of scooter models. This small, cone-shaped piece sits at the bottom of the main jet stack and controls how much fuel passes through. Because engine setups differ, it gives builders a way to adjust the mixture. If you are browsing \u003ca href=\"\/collections\/scooter-carburetors\"\u003ecarburetor and jet options for scooters\u003c\/a\u003e, this part plays an important role in tuning performance and fuel efficiency.\u003c\/p\u003e\u003ch3\u003eGetting to Know Jet Sizes\u003c\/h3\u003e\u003cp\u003eMain jets are offered in sizes ranging from 82 to 165, and the #122 falls in the middle of that range. Classic Vespa scooters typically use jets between 85 and 116, while engines with performance modifications often call for larger jets to allow more fuel flow. Picking the right size matters for getting the output you want, which is why this part is useful to both hobbyists and professional mechanics.\u003c\/p\u003e\u003ch3\u003eFitting and Tuning\u003c\/h3\u003e\u003cp\u003eSwapping the main jet is a simple job. It drops straight into the current carburetor assembly, so the old jet can be removed and the new one installed without extra modifications. Dialing in the ideal jetting, though, can take a bit of testing to find what works best for your particular engine.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 122\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Main jet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e SI carburetor main jet, size 122 (large frame SI carburetor, performance-modded engines)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Confirm the number stamped on the jet reads 122, and install it only in a large frame SI carburetor.\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":51138590933049,"sku":"TT-26279","price":4.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/main-jet-122-si-carbs-1.jpg?v=1794376187","url":"https:\/\/www.trendtimes.com\/products\/main-jet-122-si-carbs-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}