So..... thumpertalk I have some questions I know you guys always here to help. I bought a kx125, barely running with soooo many problem. So you may wonder why I would do so but I intentially did this so when I was done with it it would be done my way if you know what I meen. I was really hoping hoping I didnt have to go into the bottem end but im not sure if I need to or not now. Now I fixed everything going on with it before going into the engine minus the brakes so far. The left radiater was litteraly ripped in half and the other was disfunctional also so when the kid was riding it had no coolant at all. I now know for a fact the the head is worped and most likely the jug, so im going to wait untill christmas for my mom to get them. When I first got it, I took it completly apart, it wasnt blown up but the cylinder sleeve had horrible scoring on it. I decided to put it back together for the hell of it, and to my surprise it ran amazing, with all the old parts, cylinder rings gaskets everything. It was leaking antifreeze out the headbolt because of the reused gaskets but I planned on taking it apart again anyway. So its running great litterly no noise so I think awsome im just going to get the new gaskets and see how long it will last. So I do all that, put it back to gether again and it I take it to the end of my street take it back and it shuts off like I pressed the kill switch. When I take it apart again, the rings were smushed inside the piston and both the circlips fell out somehow. Now I know im doing this right, my dad was overwatching and he is a ase certified master mechanic and also he can fix anything from dirtbikes to a freaken t.v. so I really am trying to avoid splitting a case because ive never done it before, and im starting to lead towards a stretched rod judging by the picture you will see shortly with all those nicks. I never seen it that bad. So im gonna stop rambling now. Any suggestions would be greatly appreciated for this birthday present gone wrong. And when I say barlely running when I got it I meen it sounded absolutely horrible. Again thanks to everybody who took the time to read all this, and im only 16 so I have a hard time getting and holding on to money because im a kid I guess so any help with how to get some possible problems done cheaper would be great. Thanks!