If possible, I might try a half helmet vs. a full-face as well.

I've had the pleasure of doing this experimentation on my Heritage. I can't wear the full-face on the Heritage. But the half-helmet works fine.

 

The LRS shield and the fangs seem to fix mine. I have the adjustable wings which helps as well.
I'm 6'. The Shoei Neotec helmet with create some buffering depending on the visor placement. If it's too much I close it.

 

I run Harley brand fangs and a Klock Werks shield. I get no buffetting if it's a calm day & that's riding with my visor up. When it's windy, I get some buffetting depending on wind direction, and the visor goes down. Visor down eliminates almost all of it. Buffetting is worst when the wind is blowing at me at an angle, but with fangs and the shield I use, it's tolerable. Seems like the road is rarely going directly into the wind. That's my experience & something you might need to pay attention to.

 

I've been puzzled by this for years since I've experienced buffeting on almost every bike I've owned that had a fairing &/or windshield and I hear from others that have never experienced buffeting. It apparently takes just the right combination rider height and equipment to produce the conditions that cause the buffeting. To be clear, and as mentioned before, buffeting is NOT the same as wind. Seems that every time there's a conversation about buffeting someone inevitably chimes in to say "it's a motorcycle, there's supposed to be wind." Apparently, those riders have never experienced true buffeting and I'm glad for them. For those of us that have though, it can range from a mild head vibration to a teeth-rattling shake that'll blur your vision.

In my experience a wider or taller windshield, or a windshield with a recurve, has little or no impact on the buffeting. A shorter windshield can reduce or eliminate it though, but only because it puts the entire head in the clean air flowing over the top of the windshield. The problem is usually caused by the air coming under the fairing or windshield and rushing up along both sides of the tank into the lower pressure area behind the windshield. This creates turbulence in front of the rider and leads to helmet buffeting. This issue can be confirmed by using the palm of the hand to feel for air coming up the sides of the tank.

I've had good results with fork-mounted wind deflectors on previous bikes but on my current bike (2021 Ultra-Limited) I'm not having much luck. So far I've tried the factory 10" windshield, an H-D 12" windshield, a Freedom Shields 12" "touring width" recurve windshield, and the GADS fork-mounted & lower triple-tree wind deflectors. Nothing has eliminated the buffeting yet. I've heard a lot of positive feedback about the H-D fork deflectors (aka "Fangs") for reducing or eliminating buffeting. As much as I don't like the way they look, if they eliminated the buffeting on my bike, I'd give them a try. Unfortunately though, the last time I checked, H-D doesn't make them for the 2021 FLHTK.

I realize I could put a shorter windshield on my bike to eliminate the buffeting but I occasionally ride with my face shield up or removed and prefer not to get hit in the face with wind, bugs, and debris.

 

Can we all talk about this some more? Are there FF helmets that are better suited for cruising vs what you an I have (Shoei), which is typically seen on riders with sportbikes. I have heard this before.
Remove the visor? What kind of change would that make? I usually ride with visor up around town for max air flow but 65mph+ the visor comes down to quiet things and protect from acorns and beetles smashing into my face.....lol.
*Disclaimer, I will not use a half helmet. Not looking to shred my face off to cure wind buffeting so it's not an option.

I also have read about how you either want the wind completely over your head OR hitting you at the shoulders, so that your helmet is completely in the wind. Anywhere in between is a no-go. If the wind is going completely over your head, how do you get any ventilation? Especially on the hot days. The way my taller shields are now (10" and 11" with recurve), the air hits right at top of my helmet where I have an air vent to cool off my dome. If you're going to say "I need a slightly taller shield" that means I'll now be looking through it which I'd rather not do.

This leads me to Klock Werks where their shield seems to lean back (towards the rider) MUCH further then any other shield. This might kick the air over me without going much taller BUT the thing I hate about KW is the distortion. I ride a lot of hills which means my line of sight goes from well over a shield to well into the shield. Even when I'm looking over a KW...the distortion is still distracting. Especially the sides of the road...lines are all squiggly.

BTW,....I've read all the post and will take everyone's advise. I very much appreciate all the comments.

 

I hear you on the half helmet. My full-face is a Nolan N87. It's really never worked well on the Heritage with the windshield installed. Currently I've got a ClearView Shields custom recurve shield with vent. I've also tried the JES fangs. The fangs aren't worth the tradeoff. They are effective, but hey cut too much cooling air off in the rider pocket. Plus - IIRC - I still get enough shake/buffeting when wearing the FF (w/JES fangs installed) that I find it unacceptable. The only combo that works well is just the ClearView Shield, vent opened to 2nd position, and half helmet. It's all a compromise.

 

I have a Road King. With the windshield off it is quiet, but noticeable pressure on my chest. Not good for rain or bugs or distance.

In hot weather on the road I removed the visor from the helmet because as you know if it is open wide it acts as a big scoop and rattles thy head. My helmet was quiet with the visor off and big sun glasses. A wasp did find its way between my glasses and helmet with his stinger intact.

I realized that I need to get out of the turbulent air. I had a mustang touring seat. This seat sat higher than stock and stretches your legs a bit. So now I bought a Le Pera Maverick daddy long legs seat. This seat for my 2002 sits low and back. The seat worked great except it was more of a stretch to reach the bars. So now I have 12 inch apes from KST, and tilted them back slightly. Very happy with that.

On my last ride prior to getting sick (The Covid) I was riding with my visor up and did not realize it. I thought I did a wonderful job cleaning it, so I went to touch it but touched my face. I was only going about 50 MPH. But it is a major improvement.

Bottom line is not the air but the disturbed turbulent air, that is annoying.

 

The half helmet definitely eliminates well over half of my felt buffeting. When I have the Neotec 2 on my head, the buffeting is worse.

I am the opposite, and prefer the skull cap unless it is raining, or cold outside, so most of the time I am okay with the KW windshield, and my little DK wings under the front of the tank

 

Check out Freedom Shields. They have a few options with their recurve style wind shields. Don’t know if that is the answer to your problem but it sure was for me. Good luck!

 

I just bought a street glide last year and I'm 6 ft 1 in. Hit the highway home with my full face helmet on and it shook my head so bad my vision was about blurry. Went though several different curve and style windshields off amazon trying to fix issue. Ended up with a memthis shades 7in recurve and it is all but gone now. I can feel around with my hand while riding and don't feel anything coming up from underneath until I get out from behind fairing. Now several months later I purchased a new Sena full face helmet and what little buffeting I was still feeling has gotten even better. Maybe new helmet has better aerodynamics but it's definitely lighter weight also.