5) Beware of the Heat
I left the stock exhaust on, but removed all of the standard heat shields (except the one farthest back, near the slip-on) to create more space. Even so, the massive muffler under the R1's engine makes it a little tricky to get the lower fairing to sit up high enough that it meets well with the upper. If you've got an aftermarket pipe, you're in luck—that will create more room under the bike and allow the two pieces to get closer. If you're using the stock pipe, keep in mind that when the bike runs it'll cook the inside of bodywork. This means stickers or number plates can bubble or peel. Leave a little extra room or put some adhesive heat shield inside.