So, I have problems with my zongshen 125-30

When it is cold it starts without problems but when it is hot it is really hard to start it, almost impossible. If I turn carburetor so it is working with small number of rpm when idling it is little harder to start if it is cold but it is easier to start it when hot, so that's the compromise for now, but it is not satisfying.

Despite that, bike is running well when started and except that I do not have any problems with it.

So, could someone please help me?