BTR lovers, The newbie from the mountains of East Kentucky needs help deciding on a motor for my BTR tribute bike. I have all the parts on the way to start my build with the exception of the motor. I want an old motor, preferably made in the U.S. and want the round cylinder look. Probably 4 stroke preferred? You guys pitch in and help me out here. Before I drop $400 I would like to find the right one. All help and suggestions will be greatly appreciated. I will start a new thread when I start the build.