my bike was on the street and someone tried to steal it they tampered with both the ignition and the fuel tank although the key still works in the ignition the fuel cap was not so lucky the metal housing has broke away from the keyhole its all dug out, i've uploaded a picture what do i do to replace the fuel cap can i just un screw the allen heads and change it? and also i can smell fuel so does that mean i will have to change the fuel incase some little bits of metal dropped in?