Just bought it and it has all free mods, but I didn't do them. The airbox right now has a snorkel type of inlet on the top with a piece that runs across the top to divide the one large opening into two. Do I remove this? It also has the holes cut in the sides. Also, the clutch lever and perch has a wire and switch in it. What does it do and what happens if I replace the perch with an aftermarket one that does not accomodate this? Thanks for the help. P.S. what is the distance that can be done on the stock tank?