Re: Would this frame work?
I'm shorter than you, but weigh nearly 200lbs and a 2 stroke 50cc motor pulls me pretty well.
The moto-bike would fit you OK for short rides and cruising.
If you plan to take 25 mile rides, you will be more comfortable and get fewer cramps on a bicycle with 24" diameter or larger wheels.
There are Schwinn Stingrays and 20" BMX bikes on this sites with motor kits, but they don't travel long distances.
“You're only young once, but you can be immature as long as you like" -Unknown