running 750 carbs on a 76 550. it has pod filters 4-1 exhaust ran jets from 130 all the way down to 80's and i cant get it to stop boggin down and falling on its face when i give it any throttle. I have moved the needle around and fiddled with the mixture screws and nothing seems to help..plz help me get her goin i just wanna ride!!! THANK YOU