OK I believe it was an intake air leak! The crappy rubber mount from China! I got a good HD Mikuni and a single choke cable with half and full choke, snowmobile cable. So far it has started right up every day with very little crank or stumble. I have not rejetted it yet or even looked at the plugs. Everything bolted right up, both throttle and choke cables, no mods! Even the air cleaner mounted right up! Question I have a fuel filter with the side (smaller) opening. I come in from pump, return threw side back to tank, then out to the 2lb regulator and to the carb. Does that seem correct to you all?