Re: frustrated mom
in my opinion schools should buy these Chinese two strokes to teach small engine repair basics with. they are perfect learning tools.
you've done good by getting one of these for your kid. encourage him to be involved with the repair, even letting him loose on this forum is probably a good idea, he stands only to learn research skills, if not engine repair.
not to mention the "learning to learn" aspect of having a hobby like this (relatively affordable, and a well tread path before you with lots of advice waiting)
the look on your kids face when the bikes rough bits start to smooth out will be worth it.
Ask me about Chainmail in southern Ontario!