@FM,
there are certain cases where an item is simply a write off. I'm not a sissy to try something which is considered by others as not feasable, but....
What I would do:
-IF I really and by all means for whatever reasons wanted to revive this scoot, I would download a wiring diagram for my scoot, print it out, mark lines according to colors and follow exactely this diagram
-or, buy an identical scoot, similar MY, maybe wrecked, motor blocked, etc., pair them up and rebuilt one of those two. So you would have fun with tinkering and a satisfying result without too many expenses.