I looked in the owners manual in .PDF form and there is nothing in it mentioning how to adjust the rear shock and using the search function in Adobe the word shock doesn’t come up at all. There is also no mention of rear shock adjustment what so ever in the service manual but on page 18-13 there is a “SHOCK ABSORBER DISPOSAL PROCEDURE” that is very interesting and looks like a recipe for disaster. I looked on http://www.hondaprokevin.com/2018-h...ecs-automatic-motorcycle-ctx-700-touring-bike which has the most detailed specs and descriptions of the CTX and could find no mention of an adjustable rear shock. If you click on the link and scroll down there are some beautiful cutaway pics of the innards of the DCT. I don’t think Honda had any intention of an adjustable rear shock or they would have used it as a selling point in their advertising or put it on the specs sheet. I think the Honda designers would tell you that the shock is not designed specifically to be adjustable although the way SHOWA designed the threaded spring retainers it is possible to dial in a little more spring preload. I agree 100% with Mr. Moors assessment “You can set sag all you want, but if the spring rate is wrong for the load then it is wrong and sag isn't going to be more than a small band-aid on a wound that never heals. Spring preload adjustment is for making minor changes in ride height when there are modest changes in load, it doesn't replace getting the proper rate spring”.