Dear Ponderings,
Safe? I would not recommend riding like me. My bike is more dangerous than a motorcycle. The motor and drive assy. came as a kit and then I had to engineer it to the bike. The bike is a full suspension mountain bike that I modified somewhat to make it a street machine. The motor I added a few performance parts to give it a bit more giddyup.
Never did like choppers. Something with only two wheels you want be to close to the front tire, not farther way.
Namaste,
Michael