Author Topic: Vibration Problem  (Read 562 times)

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Offline Dan

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Vibration Problem
« on: August 02, 2017, 04:59:16 pm »
I have a vibration in my handlebars from about 68mph to 80mph in top gear. Any suggestions on how to reduce it?
2002 Concours ZG1000

Online ConcoursKZ

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Re: Vibration Problem
« Reply #1 on: August 02, 2017, 05:55:25 pm »
How many miles.on your tires?
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Offline ghostrider990

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Re: Vibration Problem
« Reply #2 on: August 02, 2017, 06:23:55 pm »
I'm going to say this "tongue-in-cheek".....

Buy another bike.   :-\

Pretty normal, but personally I don't even notice it -- never have.
I expect this from an inline 4.

It's a buzzy motor, and I think (coggers: check my math on this one) pretty typical of most inline fours.

From what I read, the BMW inline 4 engine is WAY worse than ours.  ::)

gr
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Offline ghostrider990

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Re: Vibration Problem
« Reply #3 on: August 02, 2017, 06:26:56 pm »
I'm going to say this "tongue-in-cheek".....

Buy another bike.   :-\

Pretty normal, but personally I don't even notice it -- never have.
I expect this from an inline 4.

It's a buzzy motor, and I think (coggers: check my math on this one) pretty typical of most inline fours.

From what I read, the BMW inline 4 engine is WAY worse than ours.  ::)

I think heavier BarEnds is one way of combatting the buzz...but others will chime-in.
This has been discussed here before.

gr
..."I like to keep this handy -- for Close Encounters"...

Offline Dan

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Re: Vibration Problem
« Reply #4 on: August 02, 2017, 07:09:38 pm »
Front tire is new, rear tires are about 30% used. I just purchased the bike Sunday and noticed it on my way home.
2002 Concours ZG1000

Offline 3dragonsnake

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Re: Vibration Problem
« Reply #5 on: August 02, 2017, 07:15:07 pm »
I put slip over foam grips, best solution.
P
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Offline Dan

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Re: Vibration Problem
« Reply #6 on: August 02, 2017, 07:18:14 pm »
I put slip over foam grips, best solution.
P

Any particular brand, or good place to get them?
2002 Concours ZG1000

Offline robertv

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Re: Vibration Problem
« Reply #7 on: August 02, 2017, 07:25:03 pm »
I got my grips from another COG user here- thanks Mark! Not sure where to get these local, but I recall it wasn't available via Amazon. Maybe eBay?  Here's the UK site... http://www.grip-puppy.co.uk/
2008 C14, silver [current]
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Offline Dan

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Re: Vibration Problem
« Reply #8 on: August 02, 2017, 07:45:30 pm »
I got my grips from another COG user here- thanks Mark! Not sure where to get these local, but I recall it wasn't available via Amazon. Maybe eBay?  Here's the UK site... http://www.grip-puppy.co.uk/


Thanks! Believe it or not there's a local dealer at a BMW shop about 45 mins from me and I happen to be going there Saturday for a bike show.
2002 Concours ZG1000

Offline flashback50

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Re: Vibration Problem
« Reply #9 on: August 02, 2017, 09:38:11 pm »
I'm going to say this "tongue-in-cheek".....

Buy another bike.   :-\

Pretty normal, but personally I don't even notice it -- never have.
I expect this from an inline 4.

It's a buzzy motor, and I think (coggers: check my math on this one) pretty typical of most inline fours.

From what I read, the BMW inline 4 engine is WAY worse than ours.  ::)

I was going to say then don't ride between 68-80 mph  :))   Problem solved  :rotflmao:


Offline Steve in Sunny Fla

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Re: Vibration Problem
« Reply #10 on: August 02, 2017, 09:41:04 pm »
this is posted on the wrong forum, the OP has a 2002 c-10.

hopefully a mod will move it.

Steve
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Offline ghostrider990

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Re: Vibration Problem
« Reply #11 on: August 03, 2017, 12:26:37 am »
I got my grips from another COG user here- thanks Mark! Not sure where to get these local, but I recall it wasn't available via Amazon. Maybe eBay?  Here's the UK site... http://www.grip-puppy.co.uk/


I didnt' notice the OP's model and year....

Nevertheless, I also have the Grip puppies.
Love'em.

I didn't buy them to reduce vibes, but it helps with those as well.

good product.
..."I like to keep this handy -- for Close Encounters"...

Offline Mettler1

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Re: Vibration Problem
« Reply #12 on: August 03, 2017, 12:49:24 am »
   When I got my new C10 23 yrs ago it did have vibs in the grips. Made my hands go numb!! Tried foam grips which helped but found Murphs' grips were better for me.  Now somewhere over the yrs the vibes disappeared!! Maybe I tightened the motor mounts. But I have a feeling SiSF's Torque cams helped a lot too. Good Ignition wires and caps plus carbs that are cleaned RIGHT!! Thanks, SiSF! :great:
   Might add Steve's 7th gear mod is nice in keeping the revs down at sane speeds but even at higher speeds (100 plus) vibs are never a problem. I don't run that very often. Performance AWARDS ARE expensive!!

   Which ever fix solved the problem I don't have vibes anymore. Took awhile but my Concours IS Smooooth!!

   These may have helped also.

           https://www.murphskits.com/product_reviews.php?cPath=1_90&products_id=40
« Last Edit: August 03, 2017, 12:17:52 pm by Mettler1 »
'94 Concours 115,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,SiSF'sTorque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators, SiSF carb Spa, Delkevic exhaust, Murphs' knee savers +grips, etc

Offline mnbikeguy

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Re: Vibration Problem
« Reply #13 on: August 03, 2017, 01:15:41 am »
Try the Buzz Less kit from Murphs along with the different grips. There are even a couple of freebie suggestions in the description of how these help. https://www.murphskits.com/product_info.php?products_id=76
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Offline Jim

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Re: Vibration Problem
« Reply #14 on: August 03, 2017, 10:24:47 am »
The bar weights from Murph's is a good idea.  Some folks replace their bars and bar mount.  Don't mess with the engines counter-balance adjustment no matter what you read.  Do check the torque on your motor mounts (read up on the sequence and how to check for the need of a spacer for the upper left mount).  I went with the bar weights, Murph's grips (pro grip 714) and ~14 ounces of #9 shoot in each tube portion of the handle bars.  The rest was just getting used to it.  My previous bike was a 1980, CB900 with an in-line 4.  It had rubber motor mounts and was smooth as glass so I'm very familiar with that first impression when your connie engine started vibrating.  I never give it a second thought, now.
« Last Edit: August 03, 2017, 10:51:19 am by Jim »

Offline Pbfoot

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Re: Vibration Problem
« Reply #15 on: August 03, 2017, 02:16:43 pm »
Checklist for vibration.  Check engine mounts. Adjust valves, change sparkplugs, inspect plug wires with ohm meter, repair/replace as needed.  Synchronize carbuerators.  Do free power mod. 65-85 Is the sweet spot on my bike. 
If you don't have time to do it right, when do you have time to do it over.                                                                17" wheels, Nissin 4 piston calipers.1kg Sonic Springs.Cartridge Fork Emulators. KB Brace. Galfer brake lines  Free power mod.

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Re: Vibration Problem
« Reply #16 on: August 03, 2017, 03:10:39 pm »
All above posts are good suggestions. I would also seek out (using search) "Connie Buzz" for historical fixes.

On my C10, I removed some buzz by loosening and retorking various bolts. Checking the shaft adjustment and other items.
I recently adjusted my valves and carb resync and it seems to help the most.

Been going back and forth between my C14 and C10 in the last couple of days to compare, and my C10 is just a tad more buzzy than the C14 at them speeds.

So, I'm not about to shoot my C10 anytime soon for that reason. I have the stock handle grips, bar weights, and no foam on the grips.

Harry in Wild and Windy Casper, WY - 1986 Vintage "Silverdammit" - 2015 "Greendammit"

Offline Brooke_Benfield_OR

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Re: Vibration Problem
« Reply #17 on: August 03, 2017, 04:11:55 pm »
Motor mount bolt re-torque and snug up the steering stem bearings.

I know it doesn't sound logical but you'll be very happy if these items fix the problem and they're free to do.
Brooke Benfield  2013 FJR1300  COG #2185

Offline SantaCruzRider

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Re: Vibration Problem
« Reply #18 on: August 03, 2017, 04:19:14 pm »
Great advice already, so much of mine will be +1, but it's what worked best for me:

Bar-end weights, carb synch (most improvement), gloves with gel palms, habitual one-handed riding to shake the feeling back into my finger, and finally, changing my expectations around how much numbness was "normal" both during and after my ride.
Dan Breeden
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Offline The Dude

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Re: Vibration Problem
« Reply #19 on: August 04, 2017, 04:31:38 am »
Buzz was not much of an issue for me.  Though, mine had the 7th gear mod when I bought it.  BUT... I did the conversion to a tubular bar this summer (Murph's kit and Daytona bar), and filled the bars with as much lead shot (#9?) I could put in there.  There is definitely less buzz than before.  And, my elbows are so grateful for the gentler angle.
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Offline cra-z1000

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Re: Vibration Problem
« Reply #20 on: August 04, 2017, 09:26:11 am »
Grip puppies take some getting use to since they make the grips fatter but they are pretty awesome .
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Re: Vibration Problem
« Reply #21 on: August 06, 2017, 02:35:28 am »
When I got mine back in '12, my back was still REALLY messed up, to the point that I had no choice but to lean on my arms a lot. Between that and the buzz my arms went numb FAST.


Searched the forum, found many posts on reducing the buzz, read them all. From what I've read, the consensus is to start with re-torquing (re-torq-ing? Who knows how that should be spelt?) the engine mount bolts. You may find you have a broken one.


My own experience was carb synch was the second greatest improvement. Eliminate the source of the vibe and you don't have to dampen it.


I still have a vibe at certain RPM, but those 2 things reduced it about 70%. Grips from Murph also helped, a LOT.


I've meant to get the heavy end weights, but never seem to get around to it.




Offline Dan

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Re: Vibration Problem
« Reply #22 on: August 08, 2017, 12:59:16 am »
Thanks for all the suggestions. I'm working on going through them now. I got the grip puppies, made it a little better and the gel gloves help. I ordered the bar ends yesterday and am going to tackle the motor mounts next.
2002 Concours ZG1000