Jim,, I do have the grip n rip isovibe on the zl,, the height adjustment it offers 1.5 inches up and 1/2 inch forward is very nice, however, i might have mine to tight,, meaning it still is transmitting a high frequency tingle, mostly on the throttle side,, really have not had much seat time to really go for a long ride, actually today i did 55 miles on the river and its the first i noticed it. Also i do thing that the efi smoothes out the big twins better than carbs,,yes it shakes at idle, once underway it is like all the rest
plus in my opinion, suzuki is NOT the smoothest motor out there

