Well, The Mechanical Bulls (810) came about because the Bull is Smithtown's mascot. There's also a mural someone had done a few years ago of a bull that was made of like metal and stuff. One of the ideas that was outvoted was the Mechanibulls. Let me tell you how grateful I am that that lost.
As far as 417 goes though (since I feel I ought to mention them as well) I know last year they were Stangbot and I know their mascot is the mustang. Since I only became part of their team yesterday, I'm afraid that I don't know too much about them. But, I am assuming they also based their name off their school mascot.
Well, I'm tapped for information
~Christina