Depends of your height, type of helmet and weather conditions.

 

I have the tall H-D qd windshield, plus adjustable highways pegs, which have worked fine since 2011!

 

Do you have any handlebar wobble with the tall windshield?

 

No, although I haven't ridden any faster than around 90. The shield is mounted on the fork legs, between the trees, so is isolated from the bars. Been riding it that way for ten years!

 

I touched the triple digits one time, with my tall shield on, and the bike was rock solid. I worry more about debris and critters running across the road at those speeds, than the bike wobble. This was on Dunlop American Elites, by the way. The OEM Dunlops were not that stable.

If anyone has high speed wobble, I would look first at tires, then front fender bolts (acts as a fork brace) and fork head bearings. A windshield that is properly mounted should not cause wobble.

 

I found some slight handlebar oscillation on relatively slow speed (about 50 mph) when rolling or decelerating with throttle off. It is not happening on speeds higher or lower.
And it seems that it does not happen anymore since I removed the windshield.

 

Having assembled a trike back end to a Sportster I have experienced wobble and it happens at a specific speed in either direction.

Have you fitted longer rear shocks and not raised the front equally?

 

No, all stock. However I used to wind up the rear shock to 3/4 of preload, while based on my weight I have to add just 2-3 clicks from minimal preload.