Try this again.
Displacement; 9.95 C.C (.607 CU IN.)
Bore: 24.0 m.m (.945 in.)
Stroke: 22.0 m.m (.866 in.)
Practical RPM: 2000 / 16000rpm
Power Output 1.7 ps (16000 rpm)
Weight: 470 grams (16.6 oz)
Hey, I thought I sent you guys the m instructions for the motor. I will re-send it but in an zip file.
I also believe the motor is overheating, that is why it runs for only a few minutes. I would take the head apart and get it working again before you score the piston and cylinder.