Well here goes what I've been told it use to be opened by my dad and uncle my uncle put 50,000 hard miles on it he jammed on it. My dad put a total of 10,000 miles on it then we use to haul wood out of the woods with it for prolly a good 3 years the we bought a real atv and one day I was riding it and it dogged out and locked up towed it home. A few months ago I took it apart to find the crank shaft weights or what ever there called bent in and pinched the crank shaft. That when I decided to rebuild it now it's mine im 16 btw lol but I love this thing and don't want to throw it out because that what my dad would've done if it wasn't for me and should I buy anouther stator I really don't want to put anouther 100 into this thing not knowing what is the problem