Not necessarily. It could be the new tires take time to develop the wobble-causing wear pattern induced by the loose/pitted head bearings. And there may be wear in other suspension parts, the Traxxion Dynamics guy said that they have seen significantly worn fork bushings on GL1800's at as little as 30,000 miles. There's a thread on here that talks about this, or you can jump over to YouTube to find the talk he gave... very informative (multi-part) https://www.youtube.com/watch?v=aCIO7uGziS8