Just returned from a 415 mile day trip and something has been bothering me for some time now so I decided to try to get to the bottom of it. When I ride, I keep smelling something that smells like exhaust fumes/gasolin-ish but I cannot determine if its my bike or the guys ahead of me. Seems like fumes should dissipate when the guys ahead are about a quarter mile away but maybe not . . . ? Has anybody else had any issues with certain smells that might originate from the bike one is on?