Hello, im new here. My name is David and i really need some insight. I recently bought a 99 zx9 . Have been riding hard for a month now. Two days ago it all came to a halt after gassing up at the store. Filled up and started out and the bike went half a mile and started sputtering just like it was starving for fuel. It stalled out and wouldnt start back unless i closed the choke off. It will idle( with choke closed at around 3000rpm) open idles normally but runs rough due to gassing spark plugs out with choke being closed. - Im assuming. I have a 98 zx9 parts bike ive been swapping this and that out on trying to solve my problem but to no avail. Ive changed ECU, fuel pump, relay, checked air hoses, fuel hoses, etc. When you first turn switch on you NO LONGER hear fuel pump prime. Fuel pump is good because it turns on when straight wired to battery. Bike still wont rev up tho. Can someone please tell me whats going on??