WELL I TRIED TO DECARB MY MOTOR AND A PISTON WENT OUT. DID COMPRESSION CHECK AND HAD 120 ON 1, 2, AND 3 BUT FOUR WAS 55 LBS. HAS ANYBODY HAD THIS HAPPEN TO THEM? THE MOTOR HAS RUN GOOD WITH THE EXCEPTION OF COMMON FORCE PROBLEMS. I DECARBED IT LAST TIME AND ONLY HAD 2500 MAX RPM. ANY THOUGHTS?