Normally, I don't do the 'freshman' posts as I'm normally quite familiar with the topics I discuss on forums, but in this case, seeing as how I really am a newbie to motored bicycles, I figured I would follow the forum guidelines and post here first. I've been watching this site for quite some time, and only now have I become serious in purchasing a kit for a motored bike. The one in particular is the RAW 50/80cc kit from bikeberry.com for about $150. Anyone have one of these? Is there a noticible difference between the power outputs of the two motors? How reliable are these chinese engines? I'm currently a student at the University of Minnesota, so it tends to get quite cold up here. Should I expect the motor to start even when its -12 degrees outside? Thanks! -mike.