I would lean towards the steering head bearings not adjusted properly. You did have a lot of front end work done that required the front end to be taken apart so that is were I would start. I can't see how the fork oil would come into play with this issue. The next thing I would look at would be the Dyna beads in the tire you may want to remove them and balance the wheel with conventional weights.
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08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.