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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through November 10, 2007 » Hard braking /clunking from front end « Previous Next »

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Buellrider11960
Posted on Thursday, October 25, 2007 - 01:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

anyone else experience this? torque specs checked out ok.
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Etennuly
Posted on Thursday, October 25, 2007 - 05:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What specs did you check?
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Florida_lime
Posted on Thursday, October 25, 2007 - 06:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sounds like steering head bearings, but more info needed like Etennuly said.
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Ft_bstrd
Posted on Thursday, October 25, 2007 - 06:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Three main things can clunk upon braking:

Steering head bearings
Rotor mounting hardware
Front engine mount

I'm betting head bearings first, rotor hardware second, and engine mount third.
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Florida_lime
Posted on Thursday, October 25, 2007 - 07:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ft_bstrd,

You forgot passenger helmet to rider helmet in your list !
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Murraebueller
Posted on Thursday, October 25, 2007 - 07:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Also if the internal bushings in the forks are broken/worn it can allow the slider to "clunk" against the tube. Lots of wheelies?
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Ft_bstrd
Posted on Thursday, October 25, 2007 - 07:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yeah, FL, but that one is easy to diagnose. : D

That and when you slam on the brakes and your wife comes flying up from the beaver tail to merge with you.
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Jlnance
Posted on Saturday, October 27, 2007 - 11:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yes, I rushed my bike in a panic to the dealership the day before my homecoming trip because it would "click" when I put the front brake on hard. I could reproduce it by holding the bike at a standstill with brakes on and bouncing the bike up and down on the front wheel. I retorqued the steering head bearing and that did not help.

It turned out to be normal. The front brake rotor moves, and will bang into the stops making a thunk noise. The spaces between the rotor and the stop accumulate brake dust and this muffles the noise. But if you wash the wheel off really well, like I had done when I changed the tire, it will click until you get some more dust in there.

I was skeptical when they first told me this. But the noise has gone away, just like they said it would.
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Blake
Posted on Sunday, October 28, 2007 - 07:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Rotor moves, or the pads move?
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Ft_bstrd
Posted on Sunday, October 28, 2007 - 07:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Rotor moves.

I don't believe the pads can move because of the pot pockets and lock pin.
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Blake
Posted on Sunday, October 28, 2007 - 09:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

No tolerances?
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Etennuly
Posted on Sunday, October 28, 2007 - 09:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

because of the pot pockets and lock pin

He-he....You said "pot pockets".

Did you mean "hot pockets"?

no tolerances

That's right.....zero tolerance.

(Message edited by etennuly on October 28, 2007)
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Ft_bstrd
Posted on Sunday, October 28, 2007 - 09:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mmmmmmmmmm. Hot Pockets!

The tolerances appeared to me to be pretty tight. I could be very wrong, though.

It's been known to happen before. : D
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Ratbuell
Posted on Sunday, October 28, 2007 - 09:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Quick check for rotor bushings is to grab the front brake lever (when you're already at a standstill!!) and roll the bike back and forth a bit, seeing if the wheel shifts around the drive pins that hold the rotor to the rim. If you can see the rotor move in relation to the rim a lot, you may want to have it checked for bushing replacement.

I perform this little test on my S2 every once in a while, just to make sure my rotor isn't gonna fly off the carrier when I least expect it, LOL.
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