Hi guys, my boys have a pair of 04-05 kx 65's. Today we were out going around 40mph and the 04 65 rear tire locked up and shut down. It has little compression & will not start. It has been some years since i took these little ones apart and am looking for some help. I think its the top end but not sure. Can someone let me know if i may be right or is it the bottom? Either way its coming apart, but just want to prep the wife on the expense. Thanks for the help.