Throttle Cable Adjustment

So, I've had my carbs off and on a number of times thereby requiring removal of my choke and throttle cables. When I adjust the cables for zero slop at full left or full right handle bar position the throttle is pretty loose at the center position. I just finished rebuilding my forks and the cable routing appears to be correct. The throttle grip is nice and smooth with no stickyness but Im just not happy with the slop. Have any of you guys experienced the same? My bike is a 92 vfr750.

 

FSM shows correct routing of throttle cables, which are adjustable at both top and bottom ends.