This carburetor repair kit is used on most Chinese QMB139 GY6 50cc scooter carburetors. This kit includes float, gasket, fuel pin, fuel pin nozzle, main fuel jet, fuel volume regulation screw, and float valve.
It has everything you need to get your scooter or ATV running smoothly after long periods of storage or exposure to contaminated fuel.
Unfortunately, the manufacturer did not provide us with that information, however this item includes the standard jet fuel size for 139QMB Scooter Engines. If your engine is a 50cc 139QMB engine, the jets should be the correct size for your unit.