yeah, I popped open my old sportster to look at the antenna inside. remove the two screws. Then you need a very small screw driver to pop out 4 areas where it is notched in. If you are looking at it and the screws were on the bottom, the notches are at 10 oclock, 11 oclock, 1 oclock and 2 oclock (11 and 1 on top about 20% of the way from each side). 10 and 2 on the bottom about 20% of the way down.
M&K K7's (3), K5's (2)
M&K V76 sub