Re: homemade rear kickstand?
Well, that's beyond what I can make. I'm guessing your a big fellow, but curious why you would sit on the bike while it is on its stand, to start the motor somehow? Anyway, I think you would need to make one from solid steel, welded up and might even need to beef up the attachment points at the area of the dropouts.
Someday when I grow up I will probably lose interest in toys with wheels, but until then...