Check front fork alignment

SOURCE: Car wobbles

yes make sure your lug nuts are all tight and the wheels are seated properly on the hubs, if they are tight bring the car to a tire shop and have them balance the two front tires, this will tell you if you have a bent wheel please rate -jeff

SOURCE: I get a dangerious side to side wobble at 30 - 40 on my 2000 FXST

Springer models have a tendancy to ruin neck bearings. Get the front wheel off the ground and point staight ahead. Now move the handlebars slightly from side to side. If you feel a slight "catch" or if the front wheel stays straight without falling to the side then the neck bearings are shot. They are tapered roller bearings, like a wheel bearing. The outer race will have a depression you can feel with your thumbnail. Pack the new bearings with the grease made for that purpose. A couple of hints: When h-d first made this grease available, I laughed. Use it, it works. It was originally designed for helicopter rotors. To remove the outer races, you may have to weld a bead on the bearing surface. The pre-load adjustment is critical. Too loose and you will get a wobble. Too tight and you get a weave, which is worse. It is normal for a springer front end to fall off to the left even when the wheel is pointed somewhat to the right. This is a pretty big job, so if a shop is going to do it you may want to show this to them and ask if it makes sense to them, but please don't second guess them.

SOURCE: My Silverado front end wobbles at any speed, not affected braking

Couple of checks , mud in front rims will give you a wobble. Front tire cord seperation or loose wheel nuts. , Wore out tie rod end, front wheel bearing play, or a weight has fallen off the rim and it needs balancing. If it is vibrating your steering wheel, have the front end looked at right away.

SOURCE: front end wobble

the problem is the fall away is out of adjustment i had the same problem take it to harley dealer to have it adjusted

SOURCE: death wobble in front end of 3500 4 wheel drive

check your tie rods and do you have a lift kit on that ? also you may have a belt that has shifted on one of the tires