{"product_id":"main-jet-68-for-sha-shb-carbs-for-scooters-mopeds","title":"Main Jet #68 for SHA\/SHB Carbs for Scooters \u0026 Mopeds","description":"\u003ch2\u003eMain Jet #68 for Vespa Small Frame Carbs\u003c\/h2\u003e\u003cp\u003eThis main jet suits small frame Vespa scooters running 16mm or 19mm carburetors. It works with SHA and SHB carburetors, and also with PHBG models. As a key piece of the fuel system, it controls how much fuel reaches the engine, which makes it a meaningful factor in how the scooter performs. You'll find it alongside other \u003ca href=\"\/collections\/scooter-carburetors\"\u003escooter carburetors \u0026amp; jets\u003c\/a\u003e. Getting the best result may take some trial and adjustment on your particular setup.\u003c\/p\u003e\u003ch3\u003eHow the Main Jet Works\u003c\/h3\u003e\u003cp\u003eThe main jet is the main route for fuel into the carburetor. Along with the needle and idle jet, it meters fuel across different throttle openings. Choosing the right size helps the scooter run efficiently, accelerate smoothly, and use fuel sensibly. Using the correct main jet size matters for keeping the engine responsive and performing well.\u003c\/p\u003e\u003ch3\u003eSigns It May Need Replacing\u003c\/h3\u003e\u003cp\u003ePoor acceleration, stalling, or uneven running can point to a main jet that needs swapping out. Jets can clog or wear over time, which upsets the air-fuel balance. Checking it periodically helps keep the engine healthy and the scooter running dependably.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e #68\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; also fits PHBG carbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eCompatible with:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVespa small frame (16mm SHA\/SHB carb)\u003c\/li\u003e\n\u003cli\u003eVespa small frame (19mm SHA\/SHB carb)\u003c\/li\u003e\n\u003cli\u003ePHBG carbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Check that the carb body measures 16mm or 19mm. This #68 jet is made for those two sizes. Main jets are available from 37 to 88, and #68 sits within that span.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse further:\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":51138516189241,"sku":"TT-25864","price":3.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/main-jet-68-for-sha-shb-carbs-1.jpg?v=1794375587","url":"https:\/\/www.trendtimes.com\/products\/main-jet-68-for-sha-shb-carbs-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}