I've been haunting this forum for about six months so it's about time I engaged with everyone.
I have a 70cc engine on an old Schwann 20" lowrider frame - it barely fits which I love; make its feel like they were made for each-other. I'm going for a 'found parts' ratrod kind of thing but I still have allot of work to do!
Nice job on your build .I do like how the motor fits,it looks right and tight! FYI you bike is a Bratz which looks very similar to a Schwinn frames and ... as cool. Maybe a nice tall sissy-bar to top it off.