One problem with putting a inline on the bikes is get it mounted in a way so as you don't pinch the hoses, and as far as which filter to use you would want to use a big a inlet and outlet as possable at least a 5/16 line or bigger, and it should be mounted in a way that allows for easy access, so it can be checked like at oil changes take it off and blow through it to be sure its not clogging up, I had all sorts of trouble when I had the pump mounted under the tank along with the filter, lines it was bitch making sure the lines didn't kink every time you raise or lower the tank, last year I mounted a new pump under the tail now theres all sorts of room, and the pump I used has big fine mesh screen in the inlet fitting so I did not bother with a filter, I also put on a new billit fuel rail, injectors, and lines and fittings....once I got the tune up straitened out the bikes never run better