I am not sure why this sequence works for me, but I enjoy one of the best functioning cruise controls on a GL18 IF reports on this board are accurate. I adjust the throttle play to its minimum BEFORE taking the slack out of the cruise cable. I set the cruise cable by its little "bomb sight" and not by turning out the turn buckle by several guesstimate turns. All of that may be folly, I dunno for sure; but I have no lag, I have discernible overshoot or undershoot. Freedon of undershoot seems to be rare on these bikes.
I suggest accessing the main or major throttle adjuster simply by sitting down at the front of the bike and reaching back through the LEFT hand "tunnel". It resides just behind the left fork. The access is easy, plus there is opportunity to make sure this section of cable is not kinked. It is very subject to kinking here and several of us have saved or extended the life of said cable by providing an extra stay to keep its bend more gentle.
To adjust the major adjuster; FIRST thread the minor adjuster all the way in THEN take up the slack with the major adjsuter. You want just enough free plat to assure that stop to stop handlebar motion does not raise idle. A sloppy throttle adjustment definitely does make slow manuevers more difficult or clumbsy.
2002 Black Standard Brakes "TE MEGA MONTY"
"Well, Chester; choos'n friends goes kinda fast once the shoot'n starts." Mathew Dillon to Chester Goode