A number of us with the older Vision models (now THAT sounds weird!) have had to replace gas caps due to gas fumes leaking.  But here's a heads-up on a different gas fume problem!

I did the gas cap replacement last year... but noticed last week that I smelled gas fumes pretty strongly again, and it wasn't around the gas cap. Turned out that I had a fuel injector problem... a little gas was escaping around it. My dealer is taking care of it and ordering another fuel injector under warranty, but the mechanic made a temporary fix - he wedged a small rubber block between the top of the fuel injector and the frame, which pretty well locks it down into place. I have traveled about 500 miles with it like that in the past couple of days and it is working well.

Be safe out there.