Onesaintsfan, give tyes suggestion of the rotor buttons a look. You just need a suitable size bolt, a wingnut, and two washers large enough to grip the button (or bobbins). Thread the nut through then tighten the wingnut until the washers grip and button and they rotate slightly. My bike had the same symptoms until I did the above procedure and found a number of the 'buttons' were seized. A quick twist if all of them and the pulsing disappeared.