I just had the dealer install a new Kenda K-761 front tire, - Kawasaki KLR 650 Forum
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post #1 of 38 Old 12-08-2015, 10:05 AM Thread Starter
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I just had the dealer install a new Kenda K-761 front tire,

I watched as they worked, two big guys manhandled the tire on by pushing it down on the rim while the rim was being supported by the spokes on a tire mounting stand. I now have a "high speed wobble" at 85 MPH. The bike did not have this problem previously. I normally put my own tires on but the bike is still under warranty.

The spokes appear to be fine. Is it the tire?
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post #2 of 38 Old 12-08-2015, 02:41 PM
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Was the tire balanced?? You didn't say. I've mounted lots of 761's and never had an issue. I don't however, have a need to drive at 85 MPH. I think the KLR would wobble at that speed no matter the tire.

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

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post #3 of 38 Old 12-08-2015, 02:48 PM
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Quote:
Originally Posted by klr4evr View Post
Was the tire balanced?? You didn't say. I've mounted lots of 761's and never had an issue. I don't however, have a need to drive at 85 MPH. I think the KLR would wobble at that speed no matter the tire.
Probably a balance issue. I found out NOT to ride at higher speed as I get a nasty wobble. Front is just too lite for those speeds unless all else is darn near perfect.

'01 KLR 650, '09 Suzuki DL650, '08 Suzuki Bandit 1250, '16 CRF1000L, '09 KLX 250s
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post #4 of 38 Old 12-08-2015, 02:57 PM
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What's the pressure?

Was the wheel static balanced or dynamic balanced?

How is your head bearing?

Is your preload high enough or rear spring strong enough?

Did you have the rear wheel out at the same time? Is the rear wheel aligned?

New front only? Seems like high-speed wobble affects KLRs with low rear and high front. Sometimes that's luggage on the back only, sometimes that's not enough preload. It could be that the new tire is tall enough to make handling marginal.
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post #5 of 38 Old 12-08-2015, 03:20 PM Thread Starter
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They did not balance the tire, the rear tire was replaced a month or so prior, it is also a K761. 40 psi pressure on the front. Bike has 4500 miles on it. No load on the back, and the rear shock is at it's stiffest, as I normally ride 2 up, just not fast. I guess I should not be going 85 anyway, eh?

Thanks for the replies.
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post #6 of 38 Old 12-08-2015, 05:46 PM
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Does the tire look evenly seated around the rim?
Do the rim and tire each run straight and true if spun when elevated?
I look at the Left / Right / Left / Right staggering of the center tread blocks on the K761 (Front and Rear tires) and wonder if it might could create a wobble? Compare to an Avon Gripster pattern maybe.

Might check for proper steering bearing adjustment.
Might read this old posting,
http://www.klrforum.com/54914-post25.html
from this thread,
http://www.klrforum.com/1987-2007-wr...front-end.html

pdwestman
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post #7 of 38 Old 12-08-2015, 06:09 PM
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I really like K761s; they are my preferred tire because they are inexpensive, long lasting, and work pretty well. Like the KLR, they are excellent at nothing (except wear) but pretty good at everything.

That said, I have some views that some think are controversial. Take the following with a grain of salt. Or, if you know me, go steal a salt lick from the pasture...

I mount the K761 'backwards' on the front. That is, the rotational arrow points the wrong way. I found that, regardless of pressure, that tire will cup badly if mounted according to the arrow. It will also hunt and wander something fierce on rain grooves and will follow any line in the road like Mary's little lamb. It also won't turn in worth a damn. Granted, this is my experience only and could well be a result of how I ride and how I load the bike. In fact, it probably is.

Mounted the wrong way it will work wonderfully. I find them to be good for well over 15k miles and they'll still have life left in them but they get changed out from a sense of guilt over being so damn cheap. (sorry Mark, nothing personal)

My lawyer tells me that I need to advise you not do do as I do but to merely read the above as an interesting anecdote, for following my advice you will surely die in a crumpled ball of twisted steel and mangled rubber (though I note that I have never been killed, not even once).

I also believe that any front tire should be balanced. It should be mounted with attention paid to any weight dot it might have and then checked for balance.

Paul's advice of setting the front tire up with 2psi more pressure than the rear is also good and helps with most any issue you might see in the tire.

Tom

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Last edited by Tom Schmitz; 12-08-2015 at 06:14 PM.
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post #8 of 38 Old 12-08-2015, 06:58 PM Thread Starter
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I did notice that once they man handled the tire on the rim, they lubed up the tire very well and then slid it around on the rim, Probably to align said marks. I went out today to work in the "shop" had to move the bike, and it has a front flat now. Maybe 100 miles on the front tire. There is also all kinds of slime coming out of the thing. Do these bikes come with stop leak in the tires already? Oh well, I should have put the tire on myself. This happens almost every time I get lazy and pay someone to do a simple job.
I just like for factory folks to work on stuff under warranty still.

The tire may have been going low on me and causing the wobble for all I know.
Thanks for all of the help, I too like the K761's.
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post #9 of 38 Old 12-08-2015, 07:36 PM
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Quote:
Originally Posted by Fatheroftwo View Post
I went out today to work in the "shop" had to move the bike, and it has a front flat now. Maybe 100 miles on the front tire. There is also all kinds of slime coming out of the thing. Do these bikes come with stop leak in the tires already?
They pinched the tube. The "slime" is likely the tire lube that's inside the rim and carried out by leaking air. Take it back and have them try again.

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

"It's a friggen motorcycle, it's not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you shit your pants every now and then. "

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post #10 of 38 Old 12-08-2015, 07:49 PM Thread Starter
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Not likely, it's 40 miles from home(each way). I'll bite the bullet this time and learn, again.
I am pretty confident that they did pinch the tube though. I'll know when I get it apart.
Besides, they don't like me anyway, as I provide my own tires. They charged $35.00 for the rear tire installation, and $30.00 for the front, which I thought was kind of high.
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