{"product_id":"cvk-main-jet-128-for-scooters-mopeds","title":"Cvk Main Jet (# 128) for Scooters \u0026 Mopeds","description":"\u003ch2\u003eMain Jet #128 for 139QMB and GY6 Scooters and Mopeds\u003c\/h2\u003e\u003cp\u003eThis #128 main jet is built for scooters and mopeds that use the 139QMB and GY6 engine families. It fits most CVK carburetors that have a 5mm main jet slot. As with other items in our \u003ca href=\"\/collections\/scooter-carburetors\"\u003escooter carburetors \u0026amp; jets\u003c\/a\u003e range, getting the best results often takes some experimentation when tuning the jetting. Detailed jetting guides are available if you want step-by-step help with the process.\u003c\/p\u003e\u003ch3\u003eCompatibility Information\u003c\/h3\u003e\u003cp\u003eThis jet works with engines anywhere from 50cc to 169cc, so it suits a broad selection of scooter models. If your engine's identification number contains \"QM\" or \"FM\" and your carburetor uses a 5mm slot CVK, this jet will likely match your setup.\u003c\/p\u003e\u003ch3\u003eConstruction Details\u003c\/h3\u003e\u003cp\u003eThe jet uses a Keihin round-style body that delivers a steady fuel flow for better engine output. It has an M5x0.80 thread and an overall length of 8mm, so it seats accurately in the carburetor and helps with efficiency and throttle response.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 8mm Length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e M5x0.80\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 139QMB-based 50cc\/80cc GY6 engines and 157QMJ-based 125cc\/150cc\/169cc engines with a 5mm main jet slot CVK\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD engines (50cc\/80cc)\u003c\/li\u003e\n\u003cli\u003eOther QMA and QMB engines (50cc\/80cc)\u003c\/li\u003e\n\u003cli\u003e157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A engines (125cc\/150cc\/169cc)\u003c\/li\u003e\n\u003cli\u003eOther QMJ, QMK and QMI engines (125cc\/150cc\/169cc)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Pick this jet if your carburetor has a 5mm main jet slot and an M5x0.80 thread, and your engine code matches an entry in the list above.\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":51138612527161,"sku":"TT-26422","price":3.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/cvk-main-jet-128-1.jpg?v=1794376395","url":"https:\/\/www.trendtimes.com\/products\/cvk-main-jet-128-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}