I'm new to the forum today. I've built 2 MB: a mountain bike and a recumbent. Both are home built with a Ryobi 31cc 2 stroke friction drive.
I'm currently working on a 3rd home built bike with a 4 stroke Ryobi engine.
If you want details on my builds plus a video of the motorized bicycle in action, go to my personal blog:
I've attached a couple of pictures.
Grants Pass, Oregon