2020 Bar vibration improvements? - BMW S1000RR Forums: BMW Sportbike Forum
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post #1 of 13 (permalink) Old 08-09-2019, 12:56 AM Thread Starter
GJB
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2020 Bar vibration improvements?

Anyone done anything that has reduced the bar vibration? Has anyone noticed reduced vibration with after market exhaust? How about standard clip ons?
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post #2 of 13 (permalink) Old 08-09-2019, 01:06 AM
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2020 Bar vibration improvements?

I’m getting the HVMP barends. They are amazing on my HP4
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post #3 of 13 (permalink) Old 08-09-2019, 01:31 AM
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Anyone done anything that has reduced the bar vibration? Has anyone noticed reduced vibration with after market exhaust? How about standard clip ons?
Am I the only one who doesn't notice the vibration? Bike just in for its 1,000km service so maybe removing the restrictor causes more vibration.
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post #4 of 13 (permalink) Old 08-09-2019, 02:00 AM Thread Starter
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I have only ridden the bike on track at high RPMs. Bar buzz is bad. Perhaps it is OK at lower RPMs
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post #5 of 13 (permalink) Old 08-09-2019, 02:07 AM Thread Starter
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Bar weights just shift the frequency at which the buzz occurs. Great for street riding to shift the buzz point to a RPM level that is above normal riding RPMs, but I am looking for track/race use. My tired old carpal syndrome wrists dont like buzz.....
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post #6 of 13 (permalink) Old 08-09-2019, 09:25 AM
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Weighted bar ends for sure, as a place to start.

Is there any possible connection between the lighter crankshaft on the '20, and the increased vibration? Seems possible...?
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post #7 of 13 (permalink) Old 08-09-2019, 12:35 PM
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Unlikely; lighter rotational components should put less energy into the system, decreasing vibration.

The bars form a mechanical resonant system, vibrating at a particular fixed frequency. If this frequency is within the of the characteristic frequency spectrum of the motorcycle, the bars will vibrate.

Bar end weights work in two ways. First, they move the resonant frequency to a lower pitch, hopefully avoiding the frequency spectrum of the bike. Second, weight added to the ends of the bars increases their inertia making them less willing to vibrate back and forth, preferring to stay still.
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post #8 of 13 (permalink) Old 08-09-2019, 12:52 PM
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I have heard of people filling the inside of the bars with buck shot or other substances to reduce vibration. I am curious if this helps
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post #9 of 13 (permalink) Old 08-09-2019, 02:31 PM
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It could, but to be effective it need be heavy and extend out to the bar ends. Added weight is of minimal effectiveness in the middle as we are trying to stop movement which is greatest at the free ends. Thus, most of the weight of buckshot would accomplish little while making the bar/clipons heavy.

But try it and report back.

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post #10 of 13 (permalink) Old 08-09-2019, 03:14 PM
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Originally Posted by Fbto View Post
I’m getting the HVMP barends. They are amazing on my HP4


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Very effective on my '15 as well.
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