I am new to Honda CT90, This is my first motorcyle and I decided to go with a classic. The bike was idling fine a couple of a days ago but all of a sudden it wont idle. I have the 4 screw carburetor model and there is little to nun about this particular model. The bike sturggles a ton to turn on without the choke on. I can run it with the choke on but as soon as I stop the motorcycle turns off. I'm not too sure if its an idle adjustment issue or what could be going on. anyone have any ideas?