A good, No Fuss, carburetor can be had quite cheaply...I have run it on two different motors, the Zeda 80 and on the Phantom 85 as it is now the stock carby for both replacing the basic NT carb...The gas tickler button has been eliminated, has a thicker housing clamp on area that attaches to the intake and also has an emulsifier tube which is a dramatic improvement over the basic NT...Here in the US, you can get it from Amazon for $11.99.
Set the needle valve in the middle postion to start with, in most cases, as long as your not in extreme altitudes as I am, that setting should be fine.
https://www.amazon.com/JRL-Carburetor-Stroke-Motorized-Bicycle/dp/B08N9WYS1V