Welcome!
I'm very familiar with your Shineray, since it's nearly identical to my Roketa. If you strip the frame and remove the forks and swingarm, the frame is nearly identical to an early 80's twin-shock XR200. In fact, even the shock mounts are there, and the rear rack is mounted to them.
It doesn't really matter who made the pushrod motor, since I haven't seen any real variation in them. They're my personal favourite, due mostly to the simplicity.
What size was you pocket bike motor? It sounds wicked.
Do you need any KE100 parts? I have some good parts from an '88.