I'm getting ready to take off my rear wheel to have new tire installed. Do I have to do anything to the brakes when I do this? Caliper, etc? also how hard is it to remove the mufflers? Isit just the 2 allen head bolts on the wheel side of the muffler to take them off? By the way......just put on my new switchblade 2 up windshield. it is quick release and 20 1/2 tall. I love it!