Hawaii has a catch-22 that sounds similar to PA.
I'm a cop, so I know the traffic code pretty well here, and have al the copies of the various laws easily accessible. Hawaii itself does not require turn signals unless the vehicle in question is over 24" fromthe center of the steering column to the outside edge of the vehicle. Unless you've got REALLY wide handlebars, motorcycles aren't this wide. In the Honolulu city ordinances, it states motorcycles MAY be equipped with turn signals, clearance lights, etc. The word MAY means optional.
Here's the weird part - in order for you to register your vehicle every year, you must pass what's called a "safety inspection". If you don't have the safety inspection, you can't renew your registration - period. Now, the screwed up thing, which is what might be happening in PA, is that instead of following state law, the inspection stations are given a copy of the Federal Motor Vehicle Safety Standards ( FMVSS) to use to determine if a vehicle pases inspection. The FMVSS state all motorcycles must have turn signals. What most people don't realize is the FMVSS are federal laws that ONLY apply to manufactures and dealers as far as how a vehicle must be SOLD in the United States. What makes a vehicle legal for use on a public roadway is the domain of each individual state. Unfortunately, trying to convince the brainwashed inspection people of this, even when showing them the laws in black and white, is a total waste of time.
So the solution in Hawaii, and maybe in PA, is to mount turn signals (i use an led setup powered by AA batteries) temporarily to get your inspection, then just take them off afterwards. As long as your state law doesn't require them, you can't get a ticket for not having them. Actually you might get a ticket if the officer isn't familiar with how this works. It may be a good idea to print out a copy of your state law showing turn signals aren't required, in case you get stopped, because there are actually many police officers out there that don't know turn signals aren't required in every state. But even if you get a ticket, you should be able to win in court easily.