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Rear end bouncing around during turns
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  (#1)
coooooookie
 
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Rear end bouncing around during turns - September 4, 2007, 09:28 AM

During our ride yesterday Mastrodan3rd said his rear tire was bouncing in turns.

Bike: '98 ZX-6R

Problem: Rear tire is skipping across the pavement during corners.

Tires: Old

Is this a suspension problem (i.e. too stiff) or a tire problem?

Thanks for the help.


John
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September 4, 2007, 09:36 AM

First, check the air in the tires.


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September 4, 2007, 09:37 AM

Quote:
Originally Posted by Bexxx
First, check the air in the tires.
You mean that it might be too high Bexxx? If anything I would expect it to be low since his bike has not been rode much in the last few months.


John
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September 4, 2007, 09:40 AM

If it's hot, the air will expand increasing the air pressure to increase. Even so, I've known low air pressure to cause "wiggling" in the rear tire (Cruiserhubby's experience, not my own). Either way, improper tire inflation is an easy fix. Get him to check it first.


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September 4, 2007, 09:41 AM

Quote:
Originally Posted by Audicoupej
You mean that it might be too high Bexxx? If anything I would expect it to be low since his bike has not been rode much in the last few months.
I would say low too...have him check both tires to see what it is, adjust accordingly, then take it for a spin.


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September 4, 2007, 09:47 AM

How long has the bike sat? Maybe the rear shock is frozen and has no travel? Or maybe it has a blown seal and just pogo's?


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September 4, 2007, 09:49 AM

Bexxx and Kat: I will let him know about the tire pressure.

Dodge, it sat for 2-3 months. It was used occassionally during that time though. Maybe 5 times.

It's Dan's bike. The guy that lives next door to Stacey. The guy he bought it from weighed quite a bit more than him so thats why I figured the suspenion might be a bit stiff.


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September 4, 2007, 09:59 AM

First, ceck the tire pressure. Low tire press will cause a TOTALLY diff feel than high tire press, and if it's "skipping" accross the pavement, it's too high. Trust me, I know from experience. Had GP tires on my bike, left on a ride with like 26psi in both tires b/c I knew it would expand...ESPECIALLY the way I ride. About half way thru the ride, my ass is sliding all over the place. We stop, check the pressure...I'm up to 46psi in the rear tire!!!!
The Shock....not likely unless that bike has been sitting for a LONG while in a non climate controlled atmosphere. The temp changes between night & day time, especially in winter months can play havoc on seals and gaskets and such. So unless the bike has been sitting that long. Also, I just went back up & checked, the bike is a 98 right? If that shock has NEVER been rebuilt or reworked, it's probably time. I had a 98 YZF, and my shock got really soft and squishy a few yrs ago, had to rebuild it. Didn't really affect me too much w/my riding b/c I knew that bike so damn well that I could counter any & every little twitch it threw at me and keep it under control. Anyway, hope that helps out!


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September 4, 2007, 09:59 AM

If the heavier owner changed the suspension out, that might be it. BUT i'm with dodge on the blown shock seal... with not controled rebound you are going to pogo every time the spring compresses for a corner.


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September 4, 2007, 10:14 AM

Aside from the above mentioned I could think of a few things, but they are determinate of how quick of a pace yall were pulling.

I had a hell of a time with tire sliding on my 6r, and so I dropped pressure, ended up with some hopping and squirming, I tried adjusting the damping, and rebound (preload was set) and correcting my body position (I was always up on the tank, so I scooted back) all help a little bit but the problem wasnt resolved until I eventually got rid of the Dunlop 205 and put on a Metzler M1.


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September 5, 2007, 07:20 AM

Wow! Thanks for all the great responses everyone.

Brad, our pace was slow. With the rear end boucing Dan did not want to push it much.

Is there a way to test the rear shock?


John
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September 5, 2007, 07:35 AM

Suspension Basics
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September 5, 2007, 07:38 AM

Come and ride with Venom and I through DC and you'll get used to it. Learn how to adjust your body and bike for them turns Johnnyspeed should know also.
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September 5, 2007, 07:40 AM

Quote:
Originally Posted by zx6rfool
but the problem wasnt resolved until I eventually got rid of the Dunlop 205 and put on a Metzler M1.
I can't imagine that's what fixed it.
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  (#15)
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September 5, 2007, 07:43 AM

Space: Thanks for the link. I actually found that thread a while ago and forgot all about it. Doh!

Carnage: It isn't my bike, it's my friends. But I'd like to ride with you guys anyways.

I will report back once we start testing various components.


John
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