I use Sena headsets as well. The price is right and the noise-cancelling mikes work like a champ. I have a full-face and my dad has an open face. Even with our (very) loud bikes we can talk without issue.
Get a piece of wire and bend like above. Insert the end between the grip and bar or throttle tube. Spin the wire and it'll walk all the way around the grip breaking the adhesive as it goes. Still a little work to get off after that but works like a champ! Once the adhesive is broken it's way...
Standard 7/8 bars. I have these on black drag bars http://www.kuryakyn.com/Products/4022/Gloss-Black-ISO-Grips but they are a larger diameter so they could be an issue for smaller hands.
Sean pointed out a couple of things to verify that I actually need new rotors. Got the front end put back together last night but haven't been able to go for a ride. Even so I might still get new ones though because cosmetically they look 100% better than stock . . .