Hi my GT5 stopped running all of a sudden. I have tried everything listed. Got 49 volts ac between blue and black with plug out on 1200 rpm drill. I took the entire electrical system off and replaced with new. Still nothing. Grounds are bare metal. Kill switch is deact. Positive fuel flow. New fuel filter and larger volume drain valve. Everything top dead center like in pix. Clutch good. Compression good. New NT stock carb on way. I don't think its that tho. Fires very weakly every 4th revolution. Dies immed on clutching. Ive also changed out the speed carb jets tried .66-.74 no change. PLEASE help before i go insane. I have worked on this for a month and spent lots of money.