SuzukiSavage.com - hand-numbing vibration

drums1

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hand-numbing vibration
08/24/09 at 09:03:09

Ever since last summers head replacement fiasco, I've had a vibration. Figured it was normal for a 1-lunger. Not so much around town, but at 40mph and up it literally makes my throttle hand go numb. While cruising, when I pull clutch in and throttle off, it's smooth, but with clutch in and rev throttle to match cruising rpm, it vibrates. And I can feel it in the footpegs at highway speeds--almost feels like metal on metal, like a bad bearing. But only under load, when throttling. It really sucks stopping every 5 miles or so on a road trip, to regain feeling in my hand. Any idea's? I've checked motor mounts--seem ok. I just changed oil and spark plug--no difference.

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28633 Tucson Az Gender:	Re: hand-numbing vibration Reply #1 - 08/24/09 at 10:42:25 Just a possibility,... but check your front drive pulley...
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matt Full Member Offline da na na na na mattman Posts: 228 Winter Springs, FL Gender:	Re: hand-numbing vibration Reply #2 - 08/24/09 at 10:45:22 For me, i noticed that i am in too low of a gear and/or i was giving the bars a death grip. When both are applied serious hand and feet vibs a coming my way.
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: hand-numbing vibration Reply #3 - 08/24/09 at 11:51:37 What all you had done to it? top end work? parts replaced? It's possible it could be one tooth out of time and still go. But the last guy to do so said poor performance.
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mornhm - FSO Serious Thumper Offline HMMM Posts: 1105 Gender:	Re: hand-numbing vibration Reply #4 - 08/24/09 at 12:13:31 In addition to what others have said, I would double check those motor mounts. Often engine vibrations are caused by the engine mounts being too loose, tight or cracked. Cracks in the frame are basically the same as cracks in the motor mounts.
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serenity3743

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Re: hand-numbing vibration
Reply #5 - 08/24/09 at 12:56:06

mornhm - FSO wrote on 08/24/09 at 12:13:31:

In addition to what others have said, I would double check those motor mounts. Often engine vibrations are caused by the engine mounts being too loose, tight or cracked. Cracks in the frame are basically the same as cracks in the motor mounts.

One time I left the top motor mount off and got extra vibration like you're describing.

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verslagen1

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Re: hand-numbing vibration
Reply #6 - 08/24/09 at 14:28:20

serenity3743 wrote on 08/24/09 at 12:56:06:

mornhm - FSO wrote on 08/24/09 at 12:13:31:

In addition to what others have said, I would double check those motor mounts. Often engine vibrations are caused by the engine mounts being too loose, tight or cracked. Cracks in the frame are basically the same as cracks in the motor mounts.

One time I left the top motor mount off and got extra vibration like you're describing.

Now that you mension it... I've been having an odd vibe on decel. Kinda hard like something hitting something. Had the tank off to do some work and noticed that the top mount bolts were loose. Was abit busy enjoying my "work" this morn. I'll have to pointedly check for the vibe. But I think it's gone now that the bolts are tight. Grin

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: hand-numbing vibration Reply #7 - 08/24/09 at 16:46:24 You wearing gloves? Padded? Are you holding it too tight? Odd its just that side thats going numb..
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: hand-numbing vibration Reply #8 - 08/24/09 at 17:42:56 justin_o_guy2 wrote on 08/24/09 at 16:46:24: You wearing gloves? Padded? Are you holding it too tight? Odd its just that side thats going numb.. Throttle side is hard to let go. get one of those wrist rest thingys. But, confirmed, vibration is gone with top engine bracket torque down.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: hand-numbing vibration Reply #9 - 08/24/09 at 21:05:57 I find myself gripping the throttle too tight sometimes. Using the glove to keep it gassed works, pretty well. Its hard to make myself release the throttle a bit, but with practice, the grip can be relaxed quite a bit.
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drums1 Serious Thumper Offline '87 Savage Bashed--Down for the count Posts: 664 Racine, Wisconsin Gender:	Re: hand-numbing vibration Reply #10 - 08/25/09 at 10:45:48 I have a loose grip, and even looser once the hand starts going numb. No glove 'till winter time. Not sure why the throttle side is worse but it definately is. I'm gonna check the motor mounts again and the head bolts. The upper half was replaced last summer so maybe they didn't torque them properly.
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JohnBoy

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Re: hand-numbing vibration
Reply #11 - 08/25/09 at 19:58:01

My 2004 had bar end weights added, my replacement Harley bars did not. I made some on the cheap.
two plastic cigar tubes and a cup of bird shot
fill the tubes with shot, epoxy the end caps back on and wrap enough tape around the tube to give a nice fit in the bars.
The loose shot helps to kill the vibration....night and day on mine!

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drums1 Serious Thumper Offline '87 Savage Bashed--Down for the count Posts: 664 Racine, Wisconsin Gender:	Re: hand-numbing vibration Reply #12 - 08/26/09 at 08:30:40 I never heard of this one before, but I'll give it a shot.We have at least another month or 2 of riding left here in Wisconsin, and I'd hate to waste it because of a numb hand.
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verslagen1

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Re: hand-numbing vibration
Reply #13 - 08/26/09 at 08:57:28

We've never talked ergonomics, so...
arms straight or bent? should be bent
can you let go of the bars and not adjust your riding position 1 muscle?

Weight on your hands will make them go numb in my experience.
Also, do you have stock grips? I had a set of metal and rubber grips, 3 months later I trashed them. The metal transfers the vibes easily to your hands.
And check out grip puppies.

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Phelonius Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1897	Re: hand-numbing vibration Reply #14 - 08/26/09 at 09:54:31 Just let go the bars and the vibration in the hands will stop. Phelonus
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