Got this machine for free not running and half taken apart due to what was thought to be a carb issue. I did a compression test and found 60 psi... tore down and found a bad piston head gaskit in so so condition and a pinhole in the radiator. Had the cylinder honed and checked for cracks and then completed the top end rebuild, and a carb clean and rebuild kit and fixed hole in radiator. 125 psi. Ran ok but carb was overflowing like crazy. Tried to adjust float and it still wouldnt stop leaking. New carb , ran good. Ran for 30 mins with idle turned up and then it started blowing coolant out onto the exhaust. Thought it was the head gaskit but when I tore it down again the gaskit didnt look bad. Possibly the hose between the head and lower cylinder area was bad. Changed hose and head gaskit and now it runs like crap. Sound like it is bogging/ very airy sounding if that makes sense. Tried to adjust the carb in every direction with no change. I still have 125 psi compression. Any ideas on what to look for next ?