Wobble!

[themess]

Of coarse, I may be talkin out my arse . My Bike has a High speed weave (100+) and gets loose in fast (80+) corners. Not a head shake but more like a wallow that wants to turn tank slapper. I have tried and changed everything mentioned in this thread and more. Still wobbles !

I have no personal experience with this. However, recalling other threads might provide some ideas.

> Tires, including balance and air pressure. Some magic combinations just don't work.
> Fairing, windshield, if installed
> Equal fluid levels and viscosities in forks. Equal spring pressure and length. Orifices not plugged. Equal air pressure, if air forks.
> Swing arm bearings.
> Frame alignment.

[GateKeeper]

Not much to offer on how to correct the problem your having as the previous guys have just about covered it all....

What I would like to mention, is I was out for a ride yesterday, and on a stretch of road that was open, I could see way off into the distance I let her rip, hit 150Kmh and not a twitch to be found, the bike buzzed a bit more than usuall, as I could barely see anything in the mirrors, but she rode as straight an an arrow.....and wobble free.....

.

[bonanzadave]

> Tires, including balance and air pressure. Some magic combinations just don't work.
> Fairing, windshield, if installed
> Equal fluid levels and viscosities in forks. Equal spring pressure and length. Orifices not plugged. Equal air pressure, if air forks.
> Swing arm bearings.
> Frame alignment.

Done, done and done and Head bearings & new shocks and springs & fork bushings.

I let her rip, hit 150Kmh and not a twitch to be found, the bike buzzed a bit more than usuall, as I could barely see anything in the mirrors, but she rode as straight an an arrow.....and wobble free.....

Yep. I use to do that on mine too. Not any more....

[bonanzadave]

i dropped into in a parking lot once, on a stupid tar snake going like 3 mph maybe

We have this in common. My brother tipped mine over when he bumped it with his truck. Hmmmmm ???

[bonanzadave]

This still concerns me after the new fork bushings.....

Click the pic

[scrapper]

I'm wondering if the bushings in the forks themselves could be worn and cause a problem like that? I have a problem like that but its not real bad. I have a different front end to put on, hoping that solves my problem. I cant think of anything else to change wheel bearing are new, springs new, greased up stem bearings,wheel almost new. Good luck I'm going to keep reading this one just to find out...

[John Kat]

I had this wobble issue with my GS 1000 ST.
The phenomenon decreased when I took the quarter fairing off but it was still there
As I had another GS 1000 handy I finally switched the forks around and...bingo the problem disappeared
The only difference between the two forks ( both perfectly straight) was the fact that on the defective one, I had renewed the fork tubes with non-OEM ones that don't have a separate lower bushing
I believe this creates some stiction in the forks that in turn ...generates the wobble as soon as you go over the slightest bump.
It was so bad that I couldn't ride above 120 kph whereas today...
In my view anything that hinders the linear action of the suspension front or rear will generate a wobble at high speed.

[scrapper]

Thanks for ideas my steering stem was adjusted wrong, real dummy that worked on it the first time I shouldn't let me work on it anymore...
I tightened the nut wrong so it was really loose. I'm thinking I am going to check the swing arm bearings again. It rides alot better now no wobble.

[GSEScraze]

With my bike I jacked the front up took the brakes off spun the tire and could see it go side to side just enof so I took it back to the shop I got it from and they checked it out and replaced it for free Ride on and all. Seems to ride a lot nicer I could not see in the mirrors at hi speed be for (I blamed it on them being cheap aftermarkets) but now I almost like them LOL still has a little bit but nothing like it did so I will keep looking at other things brought up in this post

[bonanzadave]

I ran it by Brian at Vintage Superbike. http://vintagesuperbike.com/history.html


Hi Dave,
I just went thru all the GS forum notes and video, many of the people who wrote in were thinking just like me, I would say head bearings and swingarm bearing's, remove and repack, re torque.

When I first started road racing in 83 I crashed the **** out of my bikes, when the fork tubes were tweaked I brought them to a guy who would put the in a press and make them straight again,,,,,,,,but were they really straight or weak now? They worked fin at Loudon which was a slow track but when I would go to Daytona or Pocono I would get up over triple digits and the bike would go into a slow weave/wobble, I didn't want to go any faster so I would just hold it there. Im sure one of the fork legs was tweaked, or maybe my lower triple clamp. If you took your forks off and brought them to a machinist he would put them in V blocks on a surface plate and run an indicator over your fork legs and tell you if one is tweaked/bent.

When ever you have your forks out and your putting them back together in the clamps, don't sock down the lower bolts real tight then do the uppers, tighten the lowers and bit, then the uppers, then the lowers again, do it in series a little at a time. And make sure they are at the same level in oil and at the same level in the upper clamp when you look at them, if one is higher or a bit lower then the other could cause a weave or wobble.

Im a big fan of steering dampeners, all production racebikes came with them stock and allows you to adjust them to the feel you like, if you had a big with big power and it lifted the front end or wiggled under acceleration and you firm up the dampener to take that feeling out.

Fork braces help on an old bike with little forks to increase rigidity, I don't think that your problem though.

I think a tweaked tube, or swingarm bearings myself. Wouldn't hurt to have the boys check you wheels for balance again if you take them off. You never know.

Good luck, If you do find the culprit ping me with the results!

Brian