Did you use fuel stabilizer when you parked it? Did you drain the float bowl when you parked it? You should have drained the tank instead of adding gas. I would drain the tank and float bowl. Then put some Seafoam or other cleaner in the gas and ride it until it's gets cleaned out? You could also take the float bowl off and spray some carb
cleaner up in side to clean out any gum on the float and jets.