I just joined. I'm looking to pick up a moped to commute with. I'm a 200 pound guy and worry about it being able to keep up with the flow of traffic. My wife has a 50cc ruccas and it maxes out at 30 mph, goes up hills at 5-10 mph. I need to keep a little speed up.
What sized engine would suite me? I'm not on highways of course, but suburban secondary roads, but still need to move along at a reasonable speed.