Hey everyone, my name is Nate. I'm a less than successful 21-year old, who doesn't have too much going for him except his intellect. I am going to move to California, where I have a room in my brother's house, free of charge. I contemplated the methods of going from here in Westerly, RI to California, and I've settled on the idea of using a gas-powered bicycle to do a coast to coast trip. I don't want to get into all the details, because you'll see the whole thing in movie theaters soon I need all the help I can get as far as the bicycle and engine go. I have a...*runs to check what kind of bike*...A mongoose cambridge. First thing I should know is -- should I get another bike? The triangle hole in the frame measures 12" vertically, and 24" diagonally; is that big/good enough for most engines? I could have a friend cut / weld a new bar in. Now, the most difficult part: Engine/drivetrain. What engine? What size? What mounting style? What modifications? What about using two or three sprockets and a shifter assy on the other side to have a wider range of power? I need to know it all -- remember, I'll be putting 3000 miles or so onto this engine, so I need a good, reliable, long lasting engine and parts. I'll carry a whole bunch of internal/external parts with me in case of failure. --what parts would be most likely to fail/which parts should I bring extra? For legal issues, let's pretend this is all hypothetical so you can tell me what engines I "could" use, instead of what engines I can't since they are illegal. Any questions, feel free to ask -- Bashing is welcome, since whatever you have to say could be used in an educational way to me. Thanks everyone who helps - Maybe I'll stop and see you on my way to California!