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I have searched this forum top to bottom trying to figure out how to fix my problem. I thought fixing whatever was causing my foot pegs to vibrate (loose motor mount) would fix this problem as well. I have the tusk d-flex handguards with the bar ends that have a little rubber sleeve around them to dampen any vibration from the metal on metal contact. I just realized today that the vibration is localized to the end of the bars. So, if you are holding on to the grips there is no vibration under the thumb and pointer but there is a very serious vibration under the ring and pinky fingers. I have tried tightening the bar ends to the max which helped a little but it still causes my hands to tingle after 30-45min of riding. Any ideas?
 

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I'm thinking you may have excessive vibration. In fact, that may have been the cause of the loose motor mount. See if you can find a fellow t-dubber nearby to compare with.



I've made several hour plus rides, some with stock and some with lightweight aluminum handlebars, at WOT almost the whole time. There is some vibration but not the hand numbing variety.



Just a thought.
 

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I have searched this forum top to bottom trying to figure out how to fix my problem. I thought fixing whatever was causing my foot pegs to vibrate (loose motor mount) would fix this problem as well. I have the tusk d-flex handguards with the bar ends that have a little rubber sleeve around them to dampen any vibration from the metal on metal contact. I just realized today that the vibration is localized to the end of the bars. So, if you are holding on to the grips there is no vibration under the thumb and pointer but there is a very serious vibration under the ring and pinky fingers. I have tried tightening the bar ends to the max which helped a little but it still causes my hands to tingle after 30-45min of riding. Any ideas?


Or you may be sensitive to the vibrations more than most. If you aren't able to isolated the cause of the vibrations, you might try a set of grip puppies.
 

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Discussion Starter #5
So is it normal for the handguards to cause a little extra vibration in the bar ends? It would make sense because they are deflecting wind, which would make anything vibrate at 60mph. The vibration did not bother me until I put on the d-flex handguards and it is only at the end of the bars so if I ride like i'm sipping tea (pinkies up) everythings fine.
I have been considering getting slip-ons or foam grips, but I wanted to make sure that this was a normal issue for people with large handguards.
 

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So is it normal for the handguards to cause a little extra vibration in the bar ends? It would make sense because they are deflecting wind, which would make anything vibrate at 60mph. The vibration did not bother me until I put on the d-flex handguards and it is only at the end of the bars so if I ride like i'm sipping tea (pinkies up) everythings fine.
I have been considering getting slip-ons or foam grips, but I wanted to make sure that this was a normal issue for people with large handguards.
Check the old forum archives.
 

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There are several remedies: shorten the bars to change the vibration harmonic; Xracer already comment about using bb's; you can also use lead shot or sand; buy a bar snake and install. None of these are guaranteed fixes, only remedies. If your bike is not moving in neutral and you hold it at the RPM where the vibration is, does it vibrate then? If so, the vibration problem is in your engine. If not, it is somewhere in your chassis/drivetrain. Just a few thoughts to help you begin to troubleshoot the issue. Good luck.
 

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Head set could be loose or head bearings could be shot. If its just the bars then FASST BARS But BB's Really? I would have thought sprayfoam
If you use spray foam it has to be very thick to be of any use. I also have the Tusk brush guards and found them to cause more vibes in the bars.After install a good set of dualsports grips and wearing a set of padded gloves it was much more pleasant.
 

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It's a single. It vibrates. A counterbalancer can only balance the mass of the reciprocating parts through half the 4 strokes since the transition from power to parasitic modes of the cycles set up a comletely different set of imbalances from the out-of-balance masses. Generally counterbalancers are engineered to balance partway between power and parasitic, reducing the effective imbalance, but not able to completely eliminate the vibrations. Completely eliminationg vibrations requires two complete counterbalance systems, one to deal with the mass, one to deal with the power. Since you can't eliminate all vibration, best one can do is make it tolerable.



I expect your guards are transfering energy from near the triple tree to the bar ends.



First thing to try is a good set of gel grips. About $12. Unless one has extremely large hands overwraps like Grip Puppies can interfere with a secure grip on the bars offroad. On the highway they are fine.



Wrap a strip of inner tube around the bars where the guards clamp on near the triple tree.



A slightly different sprocket ratio may move the annoying rpm out of your cruise zone.



Increasing the mass at the ends of the bars. Lead shot set in epoxy puts the most mass furthest out and will have a good dampning effect. Filling the entire bars just adds a lot of weight.



A change to a different handlebar material may help--aluminum bars usually do not transmit vibration as bad as steel bars.
 

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Head set could be loose or head bearings could be shot. If its just the bars then FASST BARS But BB's Really? I would have thought sprayfoam


Weight is what dampens vibration. Foam isn't dense enough. You want to seriously change the physical dynamics of the bars with length or weight. BB's, lead shot, lead plugs, etc..



Extra vibration with hand guards is normal. You basically have a longer piece of metal hanging off there that will flex and have a resonance frequency.
 

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I have searched this forum top to bottom trying to figure out how to fix my problem. I thought fixing whatever was causing my foot pegs to vibrate (loose motor mount) would fix this problem as well. I have the tusk d-flex handguards with the bar ends that have a little rubber sleeve around them to dampen any vibration from the metal on metal contact. I just realized today that the vibration is localized to the end of the bars. So, if you are holding on to the grips there is no vibration under the thumb and pointer but there is a very serious vibration under the ring and pinky fingers. I have tried tightening the bar ends to the max which helped a little but it still causes my hands to tingle after 30-45min of riding. Any ideas?


On my drz, the handguards take out A LOT of the vibration. Without weight in the bars or something to brace the outer ends, they'll vibrate. I'd recommend trying to run what you have without the rubber sleeve. Rubber can insulate from vibration but also can allow slight movement too (meaning, it could allow the end of the bars to still move/vibrate). It's something free to try.



Check for bent rim, snug motor mounts, tight headset, etc.



Otherwise, try loosening your grip.
 

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I expect your guards are transfering energy from near the triple tree to the bar ends.



First thing to try is a good set of gel grips. About $12.



Wrap a strip of inner tube around the bars where the guards clamp on near the triple tree.




As usual, Q has jumped right into the center of the REAL problem. You changed one thing, I ALWAYS go back to the last change and look there.

It would be far easier to simply take the guards back off, or even significantly loosen them where they grip the bars near the triple tree, then take a test ride then it would be to start looking elsewhere. Balancing wheels, or changing something else.



By installing the clamp near the triple tree, and the bar end, you have in effect braced it and made it stronger, so vibrations that may have self eliminated within the bar before, now travel to the end . . . .



I also second the gel grips. I can't remember the name, but I just installed a $9 set on my bars and they are great.



Good luck and please keep us in the loop.



Bag
 

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When I first got my Tdub I could only ride about 15 minutes before my hands would go numb. I did the complete carb mod thing and not only did my bike run twice as good but 80% of the vibration was gone. I could hardly believe the difference. Ben Parry gave us a technical explanation on what happened and valadated the improvment. I am sensetive to vibration and that carb job has made my rides way mo betta in more ways than one!



regards, mac



P.S. I have the Acerbis brush busters.
 

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Discussion Starter #16
Will be adjusting the carb monday night or tuesday depending on how late my jet gets here. I am in the process of tweaking the handguards after my 4hr trail ride today. I'll update when I finish the two of them. I bought the bike brand new 6mos ago so many of these issues are unrealistic seeing how it is so new, but I am looking into most of them anyway. Thanks guys
 
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