{"product_id":"main-jet-84-for-sha-shb-carbs-for-scooters-mopeds","title":"Main Jet #84 for SHA\/SHB Carbs for Scooters \u0026 Mopeds","description":"\u003ch2\u003eMain Jet #84 for Vespa Small Frame Scooters and Mopeds\u003c\/h2\u003e\u003cp\u003eThis main jet suits small frame Vespa scooters running SHA or SHB carburetors, along with PHBG models. It controls how much fuel mixes with incoming air, which directly affects how the engine runs. You will find it listed among our \u003ca href=\"\/collections\/scooter-carburetors\"\u003ecarburetor and jet options\u003c\/a\u003e. Getting the jetting right often takes some experimenting, and our blog has more tips on that process.\u003c\/p\u003e\u003ch3\u003eWhat the Main Jet Does\u003c\/h3\u003e\u003cp\u003eThe main jet meters fuel flow when the throttle is opened to the middle and upper range. Keeping this flow correct helps the engine hold its power and run efficiently. Hesitation or weak acceleration can be a sign that the main jet needs checking or swapping.\u003c\/p\u003e\u003ch3\u003eFitting Notes\u003c\/h3\u003e\u003cp\u003eThis jet drops into the existing carburetor and takes the place of the stock jet. It is made to match the original engine specifications, so it works with your current setup. Careful installation makes tuning easier and gives the best chance of a performance gain.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 84\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 Vespa small frame scooters with 16mm and 19mm SHA\/SHB carbs, and PHBG carbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVespa small frame (16mm and 19mm SHA\/SHB carbs)\u003c\/li\u003e\n\u003cli\u003ePHBG carbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Check the number stamped on your carburetor and the jetting your engine needs. This is size 84, which is one of the 37-88 sizes we carry.\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":51138515763257,"sku":"TT-25860","price":3.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/main-jet-84-for-sha-shb-carbs-1.jpg?v=1794375584","url":"https:\/\/www.trendtimes.com\/products\/main-jet-84-for-sha-shb-carbs-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}