Try heat from a hair dryer set on low or medium to soften the adhesive. Pass the heat back and forth a be patient don't rush it and keep the heat gun back away from the paint alittle. should come with alittle persuation. I have used dental floss behind the chrome to help pull it off. Keep from prying with any metal object ruin the paint for sure. keep using the dental floss even if you have to keep tearing off new pieces. slow and patient name of the game.
After you use the hairdryer...get it good and hot...take some nylon fishing line and do a sawing motion from back to front. Angle the fishing line toward the tank while you're sawing and you'll get almost all of the adhesive off of the tank.
I used the hair dryer and dental floss trick and it did pretty well. The rest of the the tape, I removed with some 3M tape remover I got from AutoZone. I DID however, get a small chip of the paint on the very front. It was my fault, to impatient. I contacted Yamaha and they hooked me up with the company that sells the matching paint. All is well now.... BTW, the red bikes use two layers, a gray then a red, of course then clearcoat.
They are plugged, with what I refer to as christmas trees. You can get them from any auto part store and they are used to hold on door panels. They are plastic and have little barbs that hold them in the hole. If you have never seen them, I can email you a pic if you want. Let me know via email