Is this a new bike for you, or have you had this bike and this is a new problem? Sounds like your just putting to much gas in it. Put the gas pump nozzle into the tank and when the pump shuts off thats it dont put anymore. Gas should not be above the cup inder the gas cap.
Shanty Irish Trash aka diegodocks
FXSTB/I aka Eoch (Celtic for horse)
FLHR/I aka FBG ( Fat Bottom Girl)