I changed by backrest and want to attach the emblem to the new rest. What kind of glue does HD use? Looks like some kind of putty. I had to use my wifes hairdryer and a wooden pry stick to get the thing off.
it's called 3M automotive acrylic plus attachment tape. It comes on a roll. Kinda pricey for one job. If you have a friend in the body shop biz, hit him up for a few pieces. It's really sturdy stuff. Goof off will soften it too. I usually rub it off with my thumb and finish up with a solvent or thinner, then buff.
You can use 3M Emblem adhesive, a tube costs about 4 bucks at your local auto supply. It is a clear adhesive, good for gluing on emblems and trim. It is also good for gluing the rubber bead on the chrome dash panels on your superglides and lowriders.
I use heavy duty velcro on mine, but it depends on what kind of emblem you have. I used to have a solid metal one that velcro did not work for because it was too heavy, I switched to a very light emblem and the velcro is perfect.
acetone, (fingernail polish remover), zippo fluid will also take any sticky residue off with ease. soak it, let it sit for a minute, soak again and rub. soak and rub as needed. depending on how much stuff you have left on the sissy bar mount or whatever. if you do this on a painted surface, make sure to wash the spot and wax afterward.