Re: Been there, done that!
Welcome to the forum, Mr. Squirrel!
The little 2-stroke Happy Times/ Grubee engines are dirt simple.
They can be alot of fun to work on, and require it.
Enjoy this place, and don't overlook Norm's 2 stroke repair center.
There is a whole encyclopedia of information here.
Electric bikes too, if you like to play with electricity.