Classic & Vintage - Suggestions on Removing a Glued-On Headbadge

OK, my 77 Trek 510 is in the process of being repainted and it came with no headbadge. I just picked up a Trek 400 that has the correct headbadge and it's in perfect condition, unlike the rest of the frame--well the head tube is the only place on the bike where the paint is unscarred--and naturally I'd like to remove the one I have and send it out to the painter for installation on my restoration but want to be able to do it without damaging the badge itself, or the backing.

I know I could probably pry it off but I'm concerned with damage so any suggestions on non-destructive removal that will leave me a pristine badge? Some kind of citrus solvent? My wife's hair dryer? I'd like to hear from anyone with experience or suggestions.

Piano wire, a skinny smooth guitar string, fishing line...You get the idea. Just use a sawing motion and downward pressure being careful not to nick the edges...

For Buell motorcycles with the lego letters on the plastic gas tanks owners have had success with dental floss and wd-40. If you add a little warmth (vs. heat) with a handheld hair blowdrier it might help.

Hairdryer works well on glued on badges.

+1 Heat. +1 Fishing line. Probably a combination of the two.

Good call on not prying it. I have made that mistake.
I use my wife's crafting heat gun to remove decals. It works very good. I just try to get it back before she notices. That said, she figured it out when I went to remove the "wood" off my old Roadmaster Wagon, the decals came right off, but she noticed I had her bright purple heat gun. Oh well.

Floss it off.

What Vincev said. Lp