Fork Bounce

[BigDaddy]

I am getting a front fork bounce when my cycle is slowing down and the brakes aren't applied... I have a 80 xs1100sg...anyone deal w/ this problem, the fork seals and oil appear to be good, no air pressure in forks.

[Dragonrider]

I would change the fork oil if you have not already, just to make sure you have the right stuff in there.

Also check the steering head bearings for proper preload and smooth (but not loose) operation.

Tire balance? Cupped? Old?

Good luck!

[BigDaddy]

Tires are brand new as of Sat...I will change the fork oil just to be safe.

[irb9494]

Fork Bounce

I had a similar problem with my SG after installing a new tire last year. I put in new fork oil and checked the steering head. Everything was in working order. There was zero air pressure in the forks as well.

After putting about 7psi in each leg, the bounce vanished and the bike handled 100% better. Maybe it is as simple as adding a little air pressure.

Hope this helps!

[Tinman]

Wobbles

Well I'm experiencing some of the same.
I have 10lbs air in each fork.
Started with low speed slowing down no brakes 40-45mph then goes away. I checked all the other stuff in previous posts except the fork oil. The low speed I don't mind and can live with if need be but it is the wobble at 110mph that scares me.
I replaced the 50% used front tire with a new one and that removed the low speed wobble but not the high speed wobble.
I have yet to check the swing arm again for looseness.
The back tire is good maybe about 50% worn still has a slightly rounded contour. The shocks in back are originals and set firm and are on the #4 setting for damping. Tires are 30lbs front and rear.
Any suggestions?

[Bob Falter]

Did the new tire get balanced? If not, I'm going to guess that it is out of balance.

[fusionking]

Hey Tinman check out the thread on counter-steering. Technique might just might get rid of that high speed wobble.

[cbird]

I had a severe headshake/wobble decelerating coming down through 40-35 mph, sometimes cruising at that speed. It went away when I changed out PO brake pads and has not come back. I put pads on more frequently now. I suspect my right caliper piston is a little rough so that at certain pad thicknesses the pad rubs the rotor, the resonance frequency of the front wheel seems to be achieved about 35 mph.

David Browne