Front end wobble - 600RR.net
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post #1 of 14 (permalink) Old 11-19-2012, 03:11 PM Thread Starter
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Front end wobble

What could cause the front wobble in a straight line? New tires, brake rotors, brake system just bleed.

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post #2 of 14 (permalink) Old 11-19-2012, 03:32 PM
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Tire not balanced? Had a buddy that had a high speed wobble at 120+. Ended up being last place that balanced, used the little ball bearings inside the tire (dont know correct term), instead of the wheel weight method. This was also multiplied by having a heavier compound tire (Shinko I believe).
He replaced front and rear with PP2ct's, balanced and problem solved.
Check balance..
What kind of tires?



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post #3 of 14 (permalink) Old 11-19-2012, 05:40 PM Thread Starter
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BT 0016R. they are new but not sparking fresh. About 100 miles on them. What about bad bearing?

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post #4 of 14 (permalink) Old 11-19-2012, 10:31 PM
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A bearing wouldn't make a wobble just noise. Did the problem start with the new tires?

Try getting the wheel on a stand and spinning it to see if there is any runout. You also may not have seated the bead completely. You should be able to visually notice that as well.
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post #5 of 14 (permalink) Old 11-22-2012, 02:03 PM Thread Starter
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What about steering head? What is a bead?

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post #6 of 14 (permalink) Old 11-22-2012, 02:09 PM
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Quote:
Originally Posted by bejbis View Post
A bearing wouldn't make a wobble just noise.
I disagree, when my rear bearing went, it felt like the wheel was moving around/wobbling. at first I thought the wheel was loose but it wasn't, got the wheel off & the bearing was destroyed
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Old 11-30-2012, 02:18 PM
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post #7 of 14 (permalink) Old 11-30-2012, 02:27 PM
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Quote:
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what the frack...
Google it. They inject some form of beads in the tire as a substitute for wheel weights. Duno if I'll trust it though.
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post #8 of 14 (permalink) Old 11-30-2012, 02:48 PM
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They're called dynabeads


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post #9 of 14 (permalink) Old 11-30-2012, 03:01 PM
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My first thought is your balance weight came off.

Have you removed the wheel recently? Maybe dropped a spacer?

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post #10 of 14 (permalink) Old 11-30-2012, 04:31 PM
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Over-filled brake reservoir can cause similar problems, especially if you just bled the brakes.

P.O of my bike did the same thing, pulled some fluid out and it went right away.

Dynabeads work well too, professional shops should be able to balance your tire appropriately too.

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post #11 of 14 (permalink) Old 12-02-2012, 02:29 PM Thread Starter
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There are a put of possible explainations. So bottom line is I will have to take the bike apart?

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post #12 of 14 (permalink) Old 12-04-2012, 02:57 AM
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Wheel Balancing

My first thought would be that the front wheel is balanced incorrectly. It's most likely down to loosing a balance weight as already mentioned or the correct weights were not applied when the tyre was changed. At the very least you might want to remove the front wheel and check that it is balanced.
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post #13 of 14 (permalink) Old 12-05-2012, 02:09 PM
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Could be a lot of things. Break the bike down and check the front end. Steering head bearing, Front wheel bearings, Front wheel spacer missing, bolts/nuts not torque'd correctly, front wheel not balanced properly to name a few, bad tire, bent/warped rotor etc

Let us know what you find. Good luck!

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post #14 of 14 (permalink) Old 12-05-2012, 04:07 PM
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A loose or bad steering head bearing will not cause "wobble."
You would know if the steering bearing is bad as soon as you apply your front brakes. It would make a "clunking" sound and you will feel the movement.

Have you removed the wheel yet, and checked your spacers? Checked to make sure you still have a balance weight?

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