got a 2000 blaster. it was bored 30 over. in the beginning had problems starting and it would flood. fixed that. it was the ignition coil. decided to clean the carb and it was dirty. they had the overflow blocked off. and a top hose blocked off. i wanted it to be right. i took the block off and fuel spilled out. now it did run blocked, just didn't seem right so i adjusted the float. no overflowing but no start. spent hours adjusting float back in forth only to get overflow or no overflow and no start.. float not overflowing it wont start. i put gas in intake directly , fires right up running high and sounding great until gone. it will not suck fuel unless overflowing. thats how i got not realizing thats how they had it running. am i wrong and they had it right? i cleaned the carb thoroughly and rebuilt. still wont suck gas, yes gas is on.i am lost and frustrated. carb seems simple. also wont start even if i give it throttle will trying to start. help please. doesn't make since to me at all. also there is a bronze skinny tube running to bottom of b owl. is that supposed to suck gas. i can't blow air thru that tube.