A litely loaded front end will show up "issues " that are damped when more weight is holding it down. You might have an out of balance tire. Put the bike on the center stand jack the front or have buddy weight the back, turn the bars, are they "notchy" and want to settle back to pointing straight ahead? If so it's time for new steering bearings. Are the wheel bearings smooth, no slack, does the brake stick or rub? with the brake caliper loosened does the wheel stop at the same point or back spin to sit at the same point each time you spin it? If so your wheel is badly out of balance. Are your front and rear wheels tracking correctly? Bike on center stand grab rear wheel push side to side, any slop? Bad swing arm bearings can cause "wobble" a common comment is that the bike felt like it had a hinge in the middle.