I was told, that if I wrapped my head pipe (08' X4) all the way to the silencer, that I would be changing my packing extremely often? This was told to me by a very good bike mechanic. He said that it would push morre heat through the silencer, and blow out the packing a lot quicker! I see many PM bikes with this wrap, and I would like to to something to keep the heat away from the rider's leg, but I really don't want to cause more maintenance.
Kind of true. If you use dirt cheap string fiber packing the added heat will break it down and it turns into something that looks like lint. That then blows out. Good packing generally won't do that to say it can't happen would be lying. If it bothers you that bad just wrap the pipe where you need relief from the heat. It will look like crap but it'll do what you want.
It only costs somewhere between $2 - $3 to repack a mini muffler using FMF 4 stroke packing. You can repack a muffler 3 - 4 times using one package too.