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Old 07-11-2012, 05:04 PM   #1
cuong-nutz
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Getting rid of numbing bar vibrations

I modded some SV660 clipons to work with the 250 and attached the stock 250 bar ends on them to help reduce the vibes but they are still there at numb fingers at cruising speeds on long trips. I have the stock Kawi grips on the bars. What else can I do to get rid of it? Better grips? Stuff the bars with buckshot?
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Old 07-11-2012, 05:18 PM   #2
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Try some heavier bar end weights, install some Pro Grip gel grips and don't grip the bars so tightly.
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Old 07-11-2012, 08:27 PM   #3
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The ninja 650 bar end weights are the heaviest i've seen. Currently looking for something more low profile. Debating bar snake, or the longes bolts I can find for the bar-ends.
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Old 07-11-2012, 08:30 PM   #4
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Throttlemeister cruise control. Heavier and you can just cruise no hands. It's fun!
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Old 07-11-2012, 09:19 PM   #5
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Quote:
Originally Posted by cuong-nutz View Post
I modded some SV660 clipons to work with the 250 and attached the stock 250 bar ends on them to help reduce the vibes but they are still there at numb fingers at cruising speeds on long trips. I have the stock Kawi grips on the bars. What else can I do to get rid of it? Better grips? Stuff the bars with buckshot?
if you've done all that to the bar ends, try adjusting your front end suspension properly to your weight and riding style. I had that same issue with my GSXR K4, now it's gone, but not sure if the same will apply to your bike.
Also, you will notice that vibration will go away or lessen when you have new tires put on the front end and as the threads wear down it'll get worse. And I bet when your GAS tank is about empty it gets worse but when you fill it up the vibrations are less noticable?
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Last edited by dabus63; 07-11-2012 at 09:23 PM.
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Old 07-11-2012, 11:13 PM   #6
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vibration

Now I may be wrong but i think all a viration is is a result of a frequency created by the engine you may never get rid of it you will just change it to what RPM that you feel it at, low, med, or hi-r's etc... unless you isolate it from your hands check if anybody makes rubber mounted handle bar mounts for your bike, also in the past i found alluminum bars do a lot for removing vibes before it reaches your hands. Just my 0.02 cents worth so if im wrong, well just trying to help.
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Old 07-11-2012, 11:21 PM   #7
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Quote:
Originally Posted by Patrick View Post
Try some heavier bar end weights, install some Pro Grip gel grips and don't grip the bars so tightly.
I'll have to see how much the 250 bar end weights weight to see how heavier I can go. I don't grip hard at all nor do I have weight on the bar.

Quote:
Originally Posted by chevy42083 View Post
The ninja 650 bar end weights are the heaviest i've seen. Currently looking for something more low profile. Debating bar snake, or the longes bolts I can find for the bar-ends.
I would imagine the 650r bar ends weigh comparably to the 250r. I wonder if there is a cheaper alternative to the bar snake I can make.

Quote:
Originally Posted by tiatool View Post
Throttlemeister cruise control. Heavier and you can just cruise no hands. It's fun!
Pricey but nice.

Quote:
Originally Posted by dabus63 View Post
if you've done all that to the bar ends, try adjusting your front end suspension properly to your weight and riding style. I had that same issue with my GSXR K4, now it's gone, but not sure if the same will apply to your bike.
Also, you will notice that vibration will go away or lessen when you have new tires put on the front end and as the threads wear down it'll get worse. And I bet when your GAS tank is about empty it gets worse but when you fill it up the vibrations are less noticable?
Good thought but it vibrates regardless but more at certain rpms than others.
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Old 07-16-2012, 10:53 AM   #8
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..
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Old 07-16-2012, 11:05 AM   #9
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The natural frequency of the bars is related to the sqrt(k/m). Where k is the stiffness and m is the mass.

If you know what rpm the handlebar vibration is greatest. That likely is one of the natural frequencies. Adding mass to the bars will lower the natural frequency.

The goal is to have the natrual frequencies not correspond with the cruzing rpm.

The size of the original bar ends is not chosen randomly. That is the size to minimize the resonance of the bars. When adding clip-ons, you have completely changed the geometry of the bars. Expect some trial and error to get it right.
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Old 07-16-2012, 12:48 PM   #10
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Duane, I'll give them a try for comparison. My 250 bar end is mounted the same as yours onto the sv650 clip-ons.
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