BuzzzzingVibbbbbbration
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Cruiser
Joined: Apr 2018
Posts: 109
Likes: 28
From: Boerne TX
BuzzzzingVibbbbbbration
16,000 miles on my 2015 Ultra low.
Just went on a 500 mile round trip by freeway doing 75-85 most of the time.
Dealer replaced front tire 1,200 miles ago with HD stock. its been up to that speed since replacement.
Head bearing, axle bearings and brakes checked out at 15K service
Very noticeable buzzing/vibration this time which has not been there before. It's in my freaking TEETH ! If I take my hands off the grips they vibrate way more than ever.
Do y'all think I threw a small weight or....?
(Tourpack and passenger seat assemble removed for this trip. Could that make a difference??)
Just went on a 500 mile round trip by freeway doing 75-85 most of the time.
Dealer replaced front tire 1,200 miles ago with HD stock. its been up to that speed since replacement.
Head bearing, axle bearings and brakes checked out at 15K service
Very noticeable buzzing/vibration this time which has not been there before. It's in my freaking TEETH ! If I take my hands off the grips they vibrate way more than ever.
Do y'all think I threw a small weight or....?
(Tourpack and passenger seat assemble removed for this trip. Could that make a difference??)
Last edited by BillMcUltralow; Mar 2, 2020 at 10:41 AM.
Stellar HDF Member
Joined: Apr 2016
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From: Masshole
What shocks are you running? Did you adjust them for the tourpak removal? I know it sounds odd but mine did exactly that when I ran the Harley tires and took of my tourpak. Next thing to check is front tire cupping. Run the palm of your hand along the tire treads front to back then back to front, do you feel a sharp edge?
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Cruiser
Joined: Apr 2018
Posts: 109
Likes: 28
From: Boerne TX
Thanks Chopperman,
I replaced the stock shocks with Revos about 2K miles ago and the front tire about 1,200 mils ago.
Checked for cupping ...nada!
Yes I did adjust the shocks after removing the tourpack. I've had it off for a couple of weeks and had not noticed this issue until this weekend when riding 200 miles into a strong headwind. (25mph)
I just replaced the Klockworks windshield with a Freedom shield today but haven't had a chance to run it up to sustained highway speeds with that kind of headwind to see if anything changed.
I replaced the stock shocks with Revos about 2K miles ago and the front tire about 1,200 mils ago.
Checked for cupping ...nada!
Yes I did adjust the shocks after removing the tourpack. I've had it off for a couple of weeks and had not noticed this issue until this weekend when riding 200 miles into a strong headwind. (25mph)
I just replaced the Klockworks windshield with a Freedom shield today but haven't had a chance to run it up to sustained highway speeds with that kind of headwind to see if anything changed.
Buzzing?
Wheel or tire vibration is going to be low frequency, more like a throbbing than a buzz.
I don't know anything on a Harley that would set up a buzz. Something loose vibrating in the wind?
Does it increase frequency with speed? or with engine RPM?
Wheel or tire vibration is going to be low frequency, more like a throbbing than a buzz.
I don't know anything on a Harley that would set up a buzz. Something loose vibrating in the wind?
Does it increase frequency with speed? or with engine RPM?
Novice
Joined: Jun 2019
Posts: 24
Likes: 25
From: Western PA
There is very little grease in a front wheel bearing. It could get hot and fail very quickly at sustained speed. My right front bearing went out at 5500 total miles on a 300 mile day with 55 mph backroad on my 2016 ultra classic. It buzzed in the handlebar and made a rumbly noise. It is an easy check. Just get the front wheel off the ground, put one hand down on the axle and give the wheel a spin. You'll know if it's bad. They're easy to replace. It is just frustrating that they put virtually no grease in them. No excuse for that. I packed the replacement with a little more grease on the re-install. Nice and smooth now. Good luck.
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Joined: Jan 2012
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From: Oklahoma
I have never calculated how many revolutions per SECOND a wheel/tire makes even at 80 mph, I suspect not many. A buzz suggests a faster rotating source. Easiest to check would the top engine to frame link mounting bolts on both ends and the bolts on the engine fitting it is attached to. Next would be exhaust interference to the frame or foot board. Has anything else been done to the machine lately that would involve moving or removing the exhaust. check clamps and exhaust to frame fittings for tightness. Going into a headwind puts more strain on the drive line and I feel more vibration in my sled when riding into the wind. more throttle and horsepower for the same speed than going with the wind. It might just be normal
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Cruiser
Joined: Apr 2018
Posts: 109
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From: Boerne TX
Good suggestions one and all and everything suggested was double checked. Everything tight, adjusted and to spec.
I have double checked all the above and I have to go with the idea that with the increased headwind and the shape of the Klockworks wind shield I was pushing around a lot more air in ways that the shield could not get through easily and was causing a different turbulence than I was used to .I'll have to get it out on the road with the new Freedom shield and see what happens. Will make an update when I can.
Thanks for the suggestions and insight, y'all are a great resource!
I have double checked all the above and I have to go with the idea that with the increased headwind and the shape of the Klockworks wind shield I was pushing around a lot more air in ways that the shield could not get through easily and was causing a different turbulence than I was used to .I'll have to get it out on the road with the new Freedom shield and see what happens. Will make an update when I can.
Thanks for the suggestions and insight, y'all are a great resource!