maybe it's spillage from your gas tank:tard. i haven't noticed any smell after a ride. but won't that smell be in the seat of your pants. seeing how that is where the exhaust fumes are generally located on the 06 zx10r:headscratch . assuming your talking about the zx10r?Has any one noticed, (you guys and gals with under seat exhaust) that your riding clothes smell of fuel after riding for awhile.....????