Handle bar vibration)))))

Started by coarsegoldkid, April 18, 2010, 09:01:51 AM

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Armor

04 M1000s, Arrows, Light Flywheel, Ohlins suspension

Monster Dave

Something that I thought of and have yet to try on my own is something that cyclists use for vibration absorption:



The vibrations are significantly stronger on our Monster's so the density of the rubber would need to be greater, but in theory the result should be similar.

RicorSHX

NERDPORN:

The Vibranator is a very efficient tuned mass damper tuned for the resonant frequencies of motorcycle handlebars.

The vibration induced involuntary muscle firing that causes numbness and tingling is the result the nervous system's defense mechanism that responds to a dominant consistent vibration frequency, the resonant frequency of the handlebar.

Tuned mass dampers interrupt and cancel the harmonic resonance so the vibration amplitude is radically reduced.

There are tuned mass dampers that use rubber as a spring. IMO, they are not as efficient as ones that use a metal spring. The rubber spring absorbs energy in both directions that should be used to exploit the oscillating mass better. The Vibranator uses hard rubber that is tightened/preloaded for mounting purposes. The mass is suspended by the metal spring and is allowed to move freely.

The end result is extreme hand pain relief and perception of a higher quality motorcycle. If your steering wheel buzzed in your car when it was new, your perception would be that it's not made well. That's why well built cars have many tuned mass dampers in them.


http://en.wikipedia.org/wiki/Tuned_mass_damper
http://en.wikipedia.org/wiki/Tonic_vibration_reflex

erichan8757

you can always do this mod, and no more vibration would be sensed.



!!!!
07 GT1000
06 M620, [SOLD]
Modifications are never too many.

Monster Dave

Quote from: RicorSHX on April 21, 2010, 05:42:36 PM
NERDPORN:

Tuned mass dampers interrupt and cancel the harmonic resonance so the vibration amplitude is radically reduced.
There are tuned mass dampers that use rubber as a spring. IMO, they are not as efficient as ones that use a metal spring. The rubber spring absorbs energy in both directions that should be used to exploit the oscillating mass better. The Vibranator uses hard rubber that is tightened/preloaded for mounting purposes. The mass is suspended by the metal spring and is allowed to move freely.
The end result is extreme hand pain relief and perception of a higher quality motorcycle. If your steering wheel buzzed in your car when it was new, your perception would be that it's not made well. That's why well built cars have many tuned mass dampers in them.

Thank you Dr. Cooper.


[cheeky]

coarsegoldkid

#20
RicorSHX sent me a PM which I responded to but I haven't heard anything in return.
So I have done some experimentation on why my right hand is effected by vibration causing it to essentially go to sleep, be numb, or tingly.  The left hand is unaffected.  Yes the handlebars vibrate.  And tightness may be contributing to discomfort but it is not what you may think.  I rode about 40 miles up a twisty bit of road at my normal spirited pace.  Right hand needed relief and at about that time there was another 20 miles of boring highway at 55mph.  Paying close attention I noticed that the vibration was really minimal at cruising speed.  I grasped the throttle lightly but still my hand didn't get much relief.  I pulled on the glove fingers and still with a light grip noticed that after a short distance my hand felt better.  I experienced this once 4 years ago riding my BMW and on that day I cut the finger tips off both right and left sides of the summer gloves I was wearing at the time as I recall all felt better.  Now I removed my right hand glove and rode another 60 miles of twisty roads, spirited pace, and no right hand issues.   The gloves I was wearing color matched the Monster and fit well, I thought, until I needed them to hold the throttle.  Odd that the left hand was doing fine.  I'm right hand dominate so maybe the hand is larger requiring a XL glove.

I had an XL pair in the garage so I rode with the color matched L on the left side and the old XL on the right.  Problem gone.  All I can determine from this is that when grasping the throttle the webbing between the thumb and index is compressing under pressure as well as the glove finger tips are compressing my digits causing the blood to stop flowing or nerve compression, similar to having your foot tingle and "go to sleep" when it is positioned a certain way, like legs crossed when sitting.

Although this should be apparent I shall still mention it the sitting to handlebar position between my BMW and Monster are different.  Less weight upon the handlebars on the BMW.

Perhaps this chapter in search of comfort is not over but needless to say I'm searching for a new pair of XL gloves.
I this process I began to pay close attention to seams of the gloves too.  Some of my gloves have a seam on the thumb that is right in contact with the throttle causing an irritation and other gloves have the seam slightly off that very spot.   I tried on several gloves at several different retailers selling several different manufactures.  I can't seem to find the proper fitting glove.  Some were okay in the thumb but tight in the little finger and/or way long in the index.  In the meantime I guess my finger tips will be exposed.
You don't stop riding motorcycles when you get old.  You get old when you stop riding motorcycles.


Howie

#22
Since you are an experienced rider you probably have hand position and no death grip worked out.  You might try different weight bar ends as this will alter vibration and perhaps a cramp buster or similar device.  

http://www.crampbuster.com/