Wobble

[bill-jr]

99 tourer about 21000 miles on her ....
Took a little ride yesterday, bike ran great was racing around with my buddy on his cbr900 was a bit cold but we trudge on ... Any ways a few times we got up over 100 mph and I noticed a terrible high speed wobble with both hands on the bars.... Have not done anything recently to change anything put a stinko on the front a week before the dragon round up ride ? Have had it up to those speeds since with no problem.... What do y'all think ? Wheel bearings, neck bearings, tire, maybe forks ? Help me out guys I like to go fast .....

[BnB Tom]

  I'll wade in with the obvious.

When you put the new tire on, did you use stick on wheel weights to balance?

  If so, you might have thrown one.

[N8171S]

Put the bike on the side stand and jack the front wheel with a jack under the engine and check the steering head bearings for a sticky spot near the center of travel.  One of my valks did the same thing @ 100 mph. Replacing the bearings corrected the problem. Coulc also be tire related.

[salty1]

I very seldom reach those speeds, but when I do the bike is smooth as "glass" because of Dyna Beads. Also, I'm no fan of Shinko tires. FWIW

[Momz]

The first thing to check is that the tires are properly inflated.
With the colder weather, the tires loose air pressure rather rapidly.

Happy New Year Bill

[Jess from VA]

I would always suspect the front tire, first. (esp if only at hi speed)

Maybe pressure, maybe balance, maybe tread irregularity, bent rim, possibly a bearing (doubt it).

Some have had a wobble from worn shock bushings in back (doubt it if only over a 100).

Head bearing?

I've had a bit of nastiness at higher speeds with bad road, bumps, and cross winds combining to get the front end shaking/wiggling/bouncing.

[IamGCW]

Swing arm loose?

Gil

[The emperor has no clothes]

I very seldom reach those speeds, but when I do the bike is smooth as "glass" because of Dyno Beads. Also, I'm no fan of Shinko tires. FWIW

+1

[bill-jr]

Ya once noticed I pulled over checked my pressures they where fine .... Shinko was not my first option but Mac had one on his shelf when I was in need so .... Beggers can't be choosers ... All the weights were still there ...... Will investigate further tomorrow after the work days over .... And with this old 86 goldwing I been tryin to get back to running order In my way .... Maybe need to build a bigger garage ....ha ..... Merry Christmas George.... And all and hoping everyone a happy new year ....

[Michvalk]

Might also check the torque on the steering head bearings

[Farther]

Check the condition of the rear shock bushings.

[bill-jr]

May have found my problem
the bolts for my windshield were so loose the shield would move forward and back an inch or so haven't gotten it back "up to speed" but I'll bet this had some factor ????

[salty1]

May have found my problem
the bolts for my windshield were so loose the shield would move forward and back an inch or so haven't gotten it back "up to speed" but I'll bet this had some factor ????

That definitely could cause a wobble at high speed!  Hope that was it. 

[Mildew]

The first thing to check is that the tires are properly inflated.
With the colder weather, the tires loose air pressure rather rapidly.

Happy New Year Bill

+1 

[john]

                                  99 tourer about 21000 miles on her ....
      i'd be guess'in its the stinko tire ...  
 nothing better to spend your money on than a good set of tires          
     good  motorcycle tires are not cheap ...
I ride the elite3 and keep 46-48 lbs of air in'em ... they last a lot longer         
my oem windshield would flutter like crazy at 100 mph ... it  made me wonder if anyone had ever been decapitated by a broken motorcycle windshield      

[Bighead]

I had a national Cycle heavy duty screen and never fluttered.

[bill-jr]

I havea clearview windshield the two top bolts were very loose the whole windshield was sliding in and out .... The tire is only a few months old but I do plan on getting a better one when I can ....

[Raider]

On a late September ride back from Maine, my bike developed a terrible wobble.  It was about an hour into the ride and the temps were down in the high 30s. 

I was leading so just kept calm as I assessed the situation.  It only took a minute to realize that my ass, literally, my ass was shaking so bad from the cold that it made the bike seem like it was shaking.  HAHAHA

Any chance the cold got to ya?

[bill-jr]

No it wasn't too cold but my seat also was not latched In in the back so u could have been a bit shakey .... When I get back from Quincy Illinois I will take her for a spin and assess the situation ...

[Ricky-D]

Lots of time a wobble at high speed can be attributed to a

DEATH GRIP

Need to slow down when that occurs.

***

[fudgie]

Lots of time a wobble at high speed can be attributed to a

DEATH GRIP

Need to slow down when that occurs.

***

Yup! When I slowed down it got worse for about 5 mph on decel.

[bill-jr]

  ha deathgrip I was just trying to keep the crotchrocket in my rear ....
I'm done with this Illinois weather ... Ready to get back to beautiful tennessee ... 
Won't be home until next Friday