I just picked up a 300 Bayou 4x4. Its ran fine for about a hour. Then it would bog down when giving throttle for about 5 mins. Then go back to running fine. It did this 3-4 times. It even shut down but would start right up.

Not sure if its fuel(flood or lack).

 

I had the same problem when my gas cap vent was plugged. I blew it out with the compressor and the problem went away.

 

Worth a shot. Cant get any easier then that.