Update: In the process of solving the problem of the head bolts loosening after 30-45 minutes of running time I found one head stud pulled the threads out so I pulled the cylinder to install a thread insert ( I don't and wont use helicoils) I found part of the piston skirt on the intake side missing and a wristpin reaining clip gone and a DEEP groove in the cylinder wall. It was running fine when I pulled it apart so i'm gonna install the thread insert and put it back together and run it 'til it says STOP. Hopefully that will be a LONG, LONG time.
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