Re: 20" Micargi Hero build
I have seen one member turn his 1970s schwinn stingray into an e-bike, storing his batteries under the banana seat.
The only motorized 1970s styled motorized stingrays I have seen have 2 stroke engines mounted in the frame.
if you want to use a 4 stroke HS engine, I would try to find a banana bike with 24" wheels.
“You're only young once, but you can be immature as long as you like" -Unknown