Most bags just clear the pipes.....depends if they are "straight pipes" or muffled..............mine are mufflers and the bags just clear the pipes by an inch.............they do get a bit of carbon on the bottoms, specially when it idles but I usually wash them regularly...........also they do get a bit of heat on the bottom but nothing to worry about.....they can handle it...........one thing to remember when packing is you don't want to put anything on the bottom that is sensitive to heat...........clothing is good.........plastics are not.........not to worry about any of this while riding as the wind will keep them cool........just be aware when duck walking in a parade.............
Krusty