bike ran for a while now wont run
so i got my bike running today total basket case. then parked it and wont start. So i took my pod filters off and nothing. Stuck my hand over carbs and bike started after i blocked air from getting in. What is wrong with the carbs that this would happen with starving air. also tried carb synching and needles went crazy when i hooked them up. was jumping all around to where i couldnt even read them. Ive never used a syncher and am wondering if maybe the lines i used were to short. I twisted the sccrew in a little and they seemed to sound alot better and needles where around the same but crazy up and down. What and where do i start on fixing this issue.