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Message: [QUOTE="mczehr, post: 1039932, member: 67846"] I am expiriencing the same problem with my 03 kx 125. I rebuilt top and bottom this winter and have the same noise. I dont think it is a pinging sound. This was present before the rebuild and at the time I thought it was the crank because of the vibration that was also present. Now it is getting worse and the vibration is bad. I didnt torque the motor mounts to spec could this be the problem? I am going to check them today but I know there tight but perhaps to tight. Any help would be great. I think we all have a similar problem. Please post any success that you have. [/QUOTE]