{"product_id":"main-jet-135-si-carbs-for-scooters-mopeds","title":"Main Jet #135, SI Carbs for Scooters \u0026 Mopeds","description":"\u003ch2\u003eMain Jet #135 for Scooters and Mopeds\u003c\/h2\u003e\u003cp\u003eThe Main Jet #135 is a key component of the carburetor setup in a range of scooters and mopeds. It controls how much fuel reaches the engine, which helps the engine run efficiently. This jet is especially well suited to classic Vespas, typically in the 85-116 range, though engines with performance modifications may call for larger jets. It belongs to the \u003ca href=\"\/collections\/scooter-carburetors\"\u003escooter carburetors \u0026amp; jets\u003c\/a\u003e lineup and can have a major effect on fuel delivery and how the engine behaves.\u003c\/p\u003e\u003ch3\u003eHow the Main Jet Works\u003c\/h3\u003e\u003cp\u003eThis small, cone-shaped jet sits in the lower part of the main jet stack. Its bore size sets how much fuel gets delivered to the engine. The number on the jet reflects its flow capacity: a higher number lets more fuel through, which matters when tuning for performance.\u003c\/p\u003e\u003ch3\u003eSigns It May Need Changing\u003c\/h3\u003e\u003cp\u003eFinding the right main jet size is usually a matter of trial and error, since every engine responds differently depending on its modifications and tuning. If you notice performance problems or a clear change in how your ride runs, it may be worth looking at jetting. Follow the specific jetting instructions for guidance through the process.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e #135\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e SI carburetors on scooters and mopeds, #135 main jet\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Pick the size that matches the number stamped on your current main jet, or tune to suit your engine. Available sizes run from 82 to 165, and a larger number means more fuel flow.\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":51138604499001,"sku":"TT-26370","price":3.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/main-jet-135-si-carbs-1.jpg?v=1794376321","url":"https:\/\/www.trendtimes.com\/products\/main-jet-135-si-carbs-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}