vibration thru seat - Kawasaki KLR 650 Forum
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post #1 of 9 Old 07-08-2011, 09:24 AM Thread Starter
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vibration thru seat

I have a new to me 08 w/ the afrika seat on it. I am liking the bike my first klr
and have heard of the vibration issues thru bars and foot pegs which i do not have.

But the seat i get a big buzz thru in the 4000 to 4800 rpm range, which is the highway cruise range. Anyone else experiance this or know of a cure.

I have checked and retorqued engine & mount bolts, same with subframe, adjusted balancer chain, added rubber washers between seat mount & frame, none of these have seemed to help.

Thanks
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post #2 of 9 Old 07-08-2011, 10:11 AM
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tunp-

What sort of seat pan does this seat use? Is it stock or aftermarket? What's the material?

The stock pan is plastic and contacts the frame at eight points, four forward and four aft. This provides for some flex in the middle and perhaps some vibration isolation.

T

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post #3 of 9 Old 07-08-2011, 10:22 AM
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I'm by no means qualified to provide an answer but...check chain tension and rear wheel alignment?
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post #4 of 9 Old 07-08-2011, 10:38 AM Thread Starter
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Originally Posted by Tom Schmitz View Post
tunp-

What sort of seat pan does this seat use? Is it stock or aftermarket? What's the material?

The stock pan is plastic and contacts the frame at eight points, four forward and four aft. This provides for some flex in the middle and perhaps some vibration isolation.

T
Plastic seat pan with i want to say 6 rubber bumper between pan and frame, the mounts in front and rear are metal and bolt to pan. So on the rear I placed to rubber washer between seat mount and frame to delete that metal to metal contact.
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post #5 of 9 Old 07-08-2011, 11:14 AM
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Sounds like you need a fatter butt. lol

I'm surprised just how smooth of a bike it is compared to my other DS's I've owned

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post #6 of 9 Old 07-08-2011, 11:15 AM
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tunp -

Not having seen such a seat, it sounds OK.

I think outdoorgb is on the right track. What you may be experiencing is a higher than normal vibration from the rear of the bike. You should, as he says, check the chain thoroughly for both condition and tension.

I had a chain on my '08 that went south. It created all kinds of odd input, to the point where I thought my clutch was going bad. Check especially the rollers. They should not be sloppy or loose fitting. Check them in several places on the chain. They don't all wear evenly. If you've got a bad section of chain it could set up vibrations at certain road speeds.

I would also start looking at the tire - what sort is it? If it's a knobbie, well, they buzz. Look for chunking, cupping, bulges, etc. Eyeball the alignment (measure from the centerline of the swing arm pivot to the centerline of the axle on both sides rather than trusting the 'alignment marks') with a tape measure.

You say there is no buzz in the handlebars or foot pegs, but how well can you see out of your mirrors?

Do you know anyone with a different seat that you can borrow? Any seat from the last 25 years will work.

How many miles on this bike?

T

Tom [email protected]

“The muzzle of the Luger looked like the mouth of the Second Street tunnel, but I didn’t move. Not being bullet proof is an idea I had had to get used to.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte

Sting like a butterfly.
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Last edited by Tom Schmitz; 07-08-2011 at 11:19 AM.
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post #7 of 9 Old 07-08-2011, 12:25 PM Thread Starter
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^^^
thanks for the replies

mileage is 1900
tire does soon need replaced, it is the stock factory
i will check chain and aligment.
but it seems more rpm related vs road speed related.
as for the mirrors i can see out of them real well there is not much vibration at all.

I will try another seat, thanks again
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post #8 of 9 Old 07-08-2011, 03:40 PM
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big buzz thru in the 4000 to 4800 rpm range,

Ride faster Granny...

- Joe

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come awn... it's not far...it'll be fun..

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post #9 of 9 Old 07-08-2011, 04:53 PM
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If anyone knows about vibration here, its me LOL.All you need to do is change your CS sprocket up, or down a tooth.
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