front end wobble/ bar shake

[yotaman88210]

In think You should re balance the wheel and see what happens

[STT-Brian]

Originally Posted by hue jass

I had this with my FZ750. On the highway, you could hold perfectly in position and just gently let go of the bars and it would start to shake. Slowly at first but definitely getting worse. I didn't dare let it go for long before I grabbed the clips.
Just a symptom of geometry...sorry, no fix.

Uh, no. You have symptoms of a tire issue, loose stering head, worn bearings, etc. You can let go of a scooter's bars and it should be tracking stright and smooth...

Hob-

Could be a tire issue, but I suspect steering head bearings. Raise the bike up via bottom of the triple clamps. You need to suspend so you can freely move the front. Grab the bottom of the forks and push and pull. If you have slop, there's your issue.

I have a front end stand that allows for this, but not sure of the pin will fit. If it does, you are welcome to try it. Hell, we could meet and tell within minutes...

[STT-Brian]

Originally Posted by Hoblick

mine is only above 55 mph... so im not sure its the same problem as what you had/have.

ill rebalance the wheel and see what happens

We had a race bike we rode for a team that never serviced it properly. head shake was only at really high speeds. Go through the kink at Nelson's and it was so bad, it would kick you out of the seat.

Checked it out and it was loose steering head bearings...

[blake1221]

Was the tire mounted backwards on the wheel, or the wheel mounted backwards on the bike :wft: if the wheel was mounted backwards I world check your brake rotors. Hahaha. Why not just put the tire back on the way it was? Then make sure your new tires are mounted properly. I'm sure the wear on the tire would cause problems if you flipped it mid stream.

[tbutera2112]

if switching the tire doesnt help, i would look into the steering head bearing...atleast check the nut to make sure its torqued properly, it could have came loose...

the vmax had a shake and it was a rubber washer that was worn out...replaced with aluminum and torqued the nut properly and the shake stoppe...didnt have to replace the actual bearing

[hue jass]

Originally Posted by STT-Brian

Uh, no. You have symptoms of a tire issue, loose stering head, worn bearings, etc. You can let go of a scooter's bars and it should be tracking stright and smooth...

Wouldn't doubt you have tire or head bearing issues but they would only magnify it. It happens because of the undulating pavement under the tires and the almost straight up fork angle of a sportbike and the 2mm change in for/aft pitch that you can't help when you let go.

You'll buy brand new tires and punish your head bearings with torque and you'll only lessen it. There are three ways to eliminate it - one, ride only on perfectly smooth, level, straight surfaces; two, get a damper or three, put your hands on the bars.

Hell, there are people who still think that it's the centrifugal force generated by the wheels rolling that keeps a bike upright.

[1000rrrider]

Could just ride wheelies, then no head shake

[STT-Brian]

Originally Posted by hue jass

Wouldn't doubt you have tire or head bearing issues but they would only magnify it. It happens because of the undulating pavement under the tires and the almost straight up fork angle of a sportbike and the 2mm change in for/aft pitch that you can't help when you let go.

You'll buy brand new tires and punish your head bearings with torque and you'll only lessen it. There are three ways to eliminate it - one, ride only on perfectly smooth, level, straight surfaces; two, get a damper or three, put your hands on the bars.

Hell, there are people who still think that it's the centrifugal force generated by the wheels rolling that keeps a bike upright.

Are you seriously saying the degree of the road is wearing out the steering head bearings? Seriously???

You also believe that you are wearing one side more than another by riding on the road????

Wow...

You do understand that the forks do not work independantly, right, but rather as one unit? The angle doesn't push one fork up further than the other...

[hue jass]

Wow

[STT-Brian]

Originally Posted by hue jass

Wow

Wow what? You are so far out in left field, man... Back up what you are saying... Maybe I am mis-reading you.