nasty smell from exhaust

i have a 92 GS-R with a light nasty smell coming from the exhaust. i also have 143k on it and was wondering what i could do to get rid of that smell. replace my oil filter or get some new piping?

if it smells like rotten eggs is your cat boss…

nope, kinda smells like…gas…its not really as strong as oil.

Did you remove your cat or gut it?

nope, never.