I've got a 2007 TW with 6,300 miles. Bought it use off of CL and have done some work including new sprockets, chain, rear tire/tube, front tube, cyclerack, and front brake fluid replacement. Lately I've noticed a thumping in the front wheel, first at higher speeds around 40, now at lower speeds aroung 20. When I lift the front tire and spin it, I can hear a slight clunk at one point in the rotation. Anyone have an experience with either the speedometer gear failing on the front wheel or a front wheel bearing starting to fail? When I bought the bike, the front tire mud guard was cracked on both sides just in front of the metal holding bracket. I JB welded that and it seems to be holding ok. It suggests that the bike had been ridden hard before I bought it. Thanks for any help.