I recently bought a 2006 Suzuki Boulevard C50 from a guy off of Facebook. I went to his house to pick it up and the bike starts fine and starts to rev as you twist the throttle until about 1/8 of the throttle twist then it just bogs out and dies. It will start right back up but does the same thing. The only way to keep it running is by continuously barely twisting the throttle. I have pulled the fuel pump out of the tank and cleaned it. Also, attached to the fuel pump is a black rubber hose that goes to what I assume is the pressure regulator?? The rubber hose had a crack in it and was real squishy to the touch. Any help would be greatly appreciated I would love to ride this beautiful bike.