How do i get the proper clutch ajustment on a 1989 xlh 1200 sportsters.i have the slack out of the cable and all the play out of the clutch ajustment screw.now what do i do next?

Ok, let's start back over again. To properly adjust the clutch, you MUST do it in a particular method due to the design of the release mechanism.

First, you must "unadjust" the cable. Find the cable adjuster and "unadjust" it making the cable as short as possible, lots of freeplay in the cable.

Then, remove the clutch access cover and remove the spring and the "lockplate" that looks like a nut with a stem on it.
Turn the clutch adjusting screw counterclockwise to remove all the free play.
Now, back off on the screw 1/4 turn.
Then reinstall the "lockplate". if it doesn't want to go back in, you may have to rotate the adjusting screw clockwise just enough to get it back in. Put the spring back in and put the clutch access cover back on.

Readjust the cable so that you have a freeplay at the clutch lever of about a eighth (1/8") inch freeplay or about the thickness of a nickle.

Lock everything down and this should be correct.
I have found that sometimes you have to "tweak" the cable adjustment to get a clutch to engage exactly where a particular rider wants it to start engaging. This is a preference type thing and has to be done on a "trial and error" basis with the cable adjustment. But, you must use this method to adjust the clutch down at the engine end of the cable. Good Luck!