My ATV starts fine but stalls when warmed up (after 10-15 minutes). I attempted to adjust the idle to run faster but I think I am at the end of the adjustment so I think I need to clean the carburetor. I have done that before but just to clean the jets and bowl of debris. Does it sound like I need to replace some parts inside? If so, what parts? Also, I am thinking I need to adjust the idle back to its original position so advice on that would be much appreciated. Also, I have read about adjusting the air/fuel screw but can't find any information as to how many turns out it should be ... although I can't imagine its out of adjustment as I have never adjusted it. Here is the diagram to aid in conversation. Thanks in advance for the advice.