I had a similar problem with mine,it turned out to be a bad tire,i had the tires balanced and they all balanced out ok,the second shop i went to the tire tech pointed out a very minor wobble with the tire,replaced the front two and all is well!
:agree: could be someething simple as a tire throwing a weight off so its out of balance, bad tire, front end alignment
or bad joint up front, should check for play all the front end linkage to make sure nothing is loose or worn.
Good luck and let us know how it turns out.
i think the problem is the steering box i tighten the screw got ride of the play in my steering took it for a small ride seems to be ok.will take it out on the open road this weekend and will see how it handles thanks to all