Hey, everyone! I'd really like to fix myself up with one of these bikes but don't know where to begin. In my research I see there's so much to chose from. I've found everything from engine kits for $109.00 to fully assembled bikes for $675.00. Should I go oil & gas mix or straight gas? I've got a Trek 820 MB and really like the oversize frame and think it would be a nice bike to install a kit on. But I'm overwhelmed by all the choices out there. I don't want to get something cheap that's going to be nothing but headaches, at the same time I don't want to spend $100's more than needed on account of my lack of knowleged. I sure would appreciate any reccomondations and or advice. Thanks! Awesome sight just what I needed!