My local shop sold me a SE high flow filter and sampson rolled thunger exhaust for my 07 flht. no fuel management, I was told it was not needed if the bike is running good. Miles later I've decided I don't want to risk running the bike to lean for to long. plugs are alway looking like it's running to lean. So how do I know when damage is done and what damage would happen? PCIII is scheduled to be installed by the dealer in two weeks.