Starts fine and will run fine for maybe 5 - 10 minutes, then it sputters down to where it will barely move. It will idle fine but bogs down when given gas. If I turn it off then immediatly start it back up again, it will run fine for maybe 20 - 30 feet then sputter down to barely moving again. It will spuuter & cough & bog down for maybe 25 -30 minutes & then it will start picking up to the point that eventually it will run fine for as long as I want to ride it. I thought maybe water in the fuel, so I put some heat in it but that didnt help. I drained some fuel into a jar, but didnt see any water in it. I just dont even know where to begin. Any thoughts or suggestions?
Thanks!