I did when I was riding there is a gas tank vent on the right side behind the seat under the bed. If you keep smelling the fumes go buy a lawn mower inline gas filter and install it on the end of the vent line. I did this and haven't smelled the fumes anymore.
I have never noticed fumes during normal driving but I have had mine leak gas when it is vertical. I got hung up on a hill with my nose in the air and gas started leaking from somewhere. It was leaking enough that I could see it dripping on the ground. It wasn't the gas cap so I am assuming it was running out of the vent hose. This happened after I had installed the filter on the vent line.