Kar Na T

hi there. i just got a yamaha virago. i drove it few times run awsome. i was fixing the horn switch and i left choke half way open overnigth, next morning muffler where leaking fuel. when i use it i refuel it with premiun gas, previus owner always use regular.

that morning bike start fine but tons of smoke and some back fire on the pipes, baffles start to fly out. a friend toke it to the hyway and smoke was gone.

but still smelling lots of gas everytime i start it and on the first gear when i try to take off the bike start like farting and then take of... anything you can sugest me to check?

i check plugs they where black but dry, air filter looks good and i cleaned just in case.

thanks for reading this...