I just bought this bike 3 days ago in kentucky, and i brought it back to tennesse when i got home it ran great as well where i picked it up at. however 1 day ago i cleaned the bike and pulled it into the garage to top of the radiator fluid, i left it and came back to try to start it. It wouldnt start unless i applied just a little throttle then it fired right up, so i adjusted the idle screw and it started to idle, but it will idle fine one sec then it will bog down and almost die another. Im not to sure what could be wrong, the only reason im conserned is because when i shift gears it tries to move itself. Should i flush the gas tank and put 91 octane in it and drive for a while to see if that helps? thanks

 

My best guess would be dirty carb slow jet/idle passage.