Hello all I have a 2001 cr125 that i purchased a few years ago. I got it from a kid that said it had a new top end. It didnt by far. You could start and ride the bike for about 15 mins and it would die. I found the compression to be very low. I pulled the top end apart and found the cyl to be chipped in a spot on a port and the top of the piston to be beat with the ring stuck. I purchased a new wiseco top end piston kit. I had the piston coated by swain industries. I got the piston back from coating and sent the piston and cylinder to eric gorr to have replated to the piston diamater. I got it back checked the ring gap to be at .011 i called wiseco and they said that would be perfect and to leave it. I installed the cylinder on it coating it with some 2stroke non synthetic oil. I got it all assembled and put fresh 90 octane fuel mixed with valvoline non synthetic oil mixed to 32to1. I got the bike to fire up and ran at idle for about 4 mins. I was told by wiseco to do this 3 time to let it get warm and shut off to let cool. I tried to start it the second time i got it to kick over 2 time and it locked up. I cannot get it to turn over. I tried to do everything right i figured if it was an oiling issue i wouldnt have got it to run for 4 mins. I need help please could it possibly be in the bottom end?