As a matter of a fact I did notice that when I get a big blast of wind or ride with a heavy cross winds that the bike seems to bog more during this time.

D-tool huh? Where do I find this?

As far as vent line goes... when this occurs I tired unscrewing the fuel tank cap, almost had the cap completely off... no difference... I will check the vent line but I don't think that is it...

Thanks again for the suggestions...

I just want to have a reliable ride...