Infamous039

Hi everyone I am new to this site. I just purchased a 1990 Banshee for $1400 on saturday. The bike seems to be sputtering when I ride, I am not sure if its the carbs or an electrical problem????????? Also the Upper A-Arms are kinda loose but dont seem to be tightening, should they be replaced ???? ( Can U Guys Pleeaassee Help Me With This Problem B/C I Am Ready To Ride )