I can ride my bike with no handlebars, no handlebars.
But when I did the last time, while coasting downhill, my front forks would start a small wobble, & then it would keep building up & getting progressively worse.
Everything seems ok when I ride normal with my hands on the bars. I think all bearings are tight, front tire is not worn funny. Just checking to see how common this may be, & maybe figure out the cause & solution. |
How old are your tires? does it do it on the flat?
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check your tires and check/replace your steering stem bearings with TRB's (tapered roller bearings) from Allballs.
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usually a tire / balance issue, could be a warped roter / sticky caliper issue. Jack the bike up and spin the front wheel, inspect all.
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I would say low air pressure.
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I know mine did that with the all balls and the 954 front end when I had lower air pressure but once I aired up some more it was all good
you have the stock frontend? I know the 1st set of 954 forks I had on of them was slightly damaged/miss adjusted from one fork to the other due to damage and it caused a wobble also |
You may have noticed from one of my posts that I have a similar issue. However it doesnt build up. Its actually mild and only happens between 40 - 60 mph and never above or below. Ive got 'newer' tires and they are both in good shape with the exception of the rear having a bit of a flat spot in the middle due to the flat riding where I live. I never had this issue with my '98 VFR although its really not that bad...but I know about it and I have OCD so it bugs me.
Does yours happen at a certain speed or all the time? |
Thanks for all the posts, I haven't been riding it much lately.
Originally Posted by spladle160
(Post 271046)
How old are your tires? does it do it on the flat?
Originally Posted by superdutyd
(Post 271068)
I would say low air pressure.
Originally Posted by toy4xchris
(Post 271077)
I know mine did that with the all balls and the 954 front end when I had lower air pressure but once I aired up some more it was all good
you have the stock frontend? I know the 1st set of 954 forks I had on of them was slightly damaged/miss adjusted from one fork to the other due to damage and it caused a wobble also
Originally Posted by midwest22
(Post 271083)
You may have noticed from one of my posts that I have a similar issue. However it doesnt build up. Its actually mild and only happens between 40 - 60 mph and never above or below. Ive got 'newer' tires and they are both in good shape with the exception of the rear having a bit of a flat spot in the middle due to the flat riding where I live. I never had this issue with my '98 VFR although its really not that bad...but I know about it and I have OCD so it bugs me.
Does yours happen at a certain speed or all the time? |
Heh heh heh every BMW I've ever owned did that.
BMs are just that way. Tires and correct set-up help, but it's just an exaggeration of the series of mild ellipses we all always ride, anyway. No-one ever rides a dead straight line. It is always good policy to ride with at least one hand on a bar at all times - didn't your Mommy tell you that - "Look, Mom - no hands.....look, Mom, no teeth"? |
Originally Posted by PJay
(Post 274436)
Heh heh heh every BMW I've ever owned did that.
BMs are just that way. Tires and correct set-up help, but it's just an exaggeration of the series of mild ellipses we all always ride, anyway. No-one ever rides a dead straight line. It is always good policy to ride with at least one hand on a bar at all times - didn't your Mommy tell you that - "Look, Mom - no hands.....look, Mom, no teeth"? |
I do this alot, hands off riding down hill toward a stop and have had this vibration, judder, wobble. Balance usually changes after prolonged tire wear and front tires often wear unevenly. If you can lift the front wheel and rotate the wheel and feel the tire surface there is likely some irregularity. You can check the balance if you have jack stands or other means of supporting the wheel, or if you back the brakes off so there is no drag, do it on the bike. Make sure the tire bead line is even all the way around the rim on both sides, make sure the tires are warmed so there is no flat spot from sitting with weight on it. You can remove the weight if there is one and re-balance with dynabeads, stick-on or rim weights. Also, reduce the air pressure to 32psi cold and see if the wobble is reduced. If you do nothing, you'll probably discover that when you replace the tire and balance, your hands off vibration will have disappeared.
you said you installed a fork brace. I put one on my xr650l and later discovered accidently that it was too tight. I was changing fork oil, so I removed the caps, compressed the forks completely to exhaust all the oil, and the one side stuck and wouldn't drop without pulling it down. I couldn't believe that when i losened the brace bolt by a small amt on that side, it dropped immediately. When the bike was sitting on its own weight with oil in the forks, i couldn't detect this drag on the one fork. I guess the lesson is that fork braces can be tricky to install correctly and should be tested for overtighening and misalignment before riding. let us know if you reslove the issue so others may learn. |
Originally Posted by nath981
(Post 275291)
I do this alot, hands off riding down hill toward a stop and have had this vibration, judder, wobble. Balance usually changes after prolonged tire wear and front tires often wear unevenly. If you can lift the front wheel and rotate the wheel and feel the tire surface there is likely some irregularity. You can check the balance if you have jack stands or other means of supporting the wheel, or if you back the brakes off so there is no drag, do it on the bike. Make sure the tire bead line is even all the way around the rim on both sides, make sure the tires are warmed so there is no flat spot from sitting with weight on it. You can remove the weight if there is one and re-balance with dynabeads, stick-on or rim weights. Also, reduce the air pressure to 32psi cold and see if the wobble is reduced. If you do nothing, you'll probably discover that when you replace the tire and balance, your hands off vibration will have disappeared.
you said you installed a fork brace. I put one on my xr650l and later discovered accidently that it was too tight. I was changing fork oil, so I removed the caps, compressed the forks completely to exhaust all the oil, and the one side stuck and wouldn't drop without pulling it down. I couldn't believe that when i losened the brace bolt by a small amt on that side, it dropped immediately. When the bike was sitting on its own weight with oil in the forks, i couldn't detect this drag on the one fork. I guess the lesson is that fork braces can be tricky to install correctly and should be tested for overtighening and misalignment before riding. let us know if you reslove the issue so others may learn. |
You're right, there are many possibilities, but eliminate the obvious first. A new tire mounted and balanced properly will likely resolve this issue which i've experienced a couple times. Then if it doesn't, you'll need to start checking everything from wheel bearings to steering stem bearings, fork stitction, alignment, fork brace and who knows what else. But from my experience it has always been the tire. Let us know what you find out.
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I just replaced my front. Whilst it was still legal, but when taking a good look at it, it showed the profile had altered slightly, but more importantly, if you ran your hand along the tyre you could feel a consistent rise and fall in the profile an inch each side of centreline.
Haven't put the wheel back on yet but fully expect the wobbles to have gone. BBB |
Originally Posted by B R
(Post 271045)
But when I did the last time, while coasting downhill, my front forks would start a small wobble, & then it would keep building up & getting progressively worse.
Everything seems ok when I ride normal with my hands on the bars. I think all bearings are tight, front tire is not worn funny. Just checking to see how common this may be, & maybe figure out the cause & solution. What does it do when you stand on the seat ? |
Originally Posted by kai ju
(Post 276175)
What does it do when you stand on the seat ?
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