my son rides a 06 kx 100. We were at the track praticing Sunday and the motor locked up. There was no signs at all of this about to happen. He told me that the bike was running strong as ever and then, as he was about to jump a table top it locked up. When he first pulled it to the side I could not turn the engine but I didnt use alot of force. After the it cooled and contracted I was able to turn it a couple of times I wanted to here and feel how ruff it was " maybe a dum move" it was ruff feeling. A guy at the track seems to think that my piston skirt broke off. And That i might just have to buy a pistion and they usual stuff to rebuild to top end. The man that I bought it from said it had 10 hrs on the top end. My son has put, at least 10 more hrs on it. Can anyone give me some ideas on what may have happen and what kind of bill Im looking at? Thanks for youlls help
Oh buy the way I amsoil at 40 : 1
Oh buy the way I amsoil at 40 : 1