{"product_id":"main-jet-140-si-carbs-for-scooters-mopeds","title":"Main Jet #140, SI Carbs for Scooters \u0026 Mopeds","description":"\u003ch2\u003eMain Jet #140 for Classic Vespas and Modified Scooters\u003c\/h2\u003e\u003cp\u003eThe Main Jet #140 is a cone-shaped part that sits in the main jet stack of a scooter carburetor. It controls how much fuel flows through, and it suits a range of scooter and moped setups, especially older Vespas. Because it sets the fuel-to-air mix, it has a direct role in how your ride's fuel system runs. You can browse more \u003ca href=\"\/collections\/scooter-carburetors\"\u003ecarburetor and jet options\u003c\/a\u003e to find other parts that help with performance.\u003c\/p\u003e\u003ch3\u003eKnowing the Jet Size Range\u003c\/h3\u003e\u003cp\u003eMain jets are made in sizes from 82 up to 165. Classic Vespa models commonly use jets between 85 and 116. Scooters that have been modified for more power often need larger jets to supply the extra fuel they burn. The size you select controls how much fuel reaches the engine, which in turn shapes overall performance.\u003c\/p\u003e\u003ch3\u003eTuning for Your Setup\u003c\/h3\u003e\u003cp\u003eSetting up a carburetor usually takes some trial and error. The right jet depends on several things, such as engine changes and the conditions you ride in. For the best outcome with your particular build, follow the jetting guidance available to you.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e #140\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Main jet stack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e SI carburetors on scooters and mopeds, main jet stack position (size #140)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Check the number stamped on your current main jet, or use the size your engine's jetting specifies. This jet is #140, and available sizes 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":51138590146617,"sku":"TT-26275","price":3.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/main-jet-140-si-carbs-1.jpg?v=1794376181","url":"https:\/\/www.trendtimes.com\/products\/main-jet-140-si-carbs-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}