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Buell Motorcycle Forum » XBoard » Buell XBoard Archives » Harsh (bad) vibration from front end during heavy braking « Previous Next »

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T9r
Posted on Tuesday, May 09, 2006 - 11:40 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

2003 XB9r has 12,000 mi
Not more than 1k miles ago I adjusted steering nut torque.

Last week I noticed when braking hard, at the front brake there was a violent shaking. I let off and reapplied the brake and it did it continued.

Under light breaking there is a slight pulsation from the front end.

I checked the isolator mount and it looked good.


Still on original brake pads.
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Glitch
Posted on Tuesday, May 09, 2006 - 11:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Still on original brake pads.
Replace pads before you need to replace the rotor, if it's not too late already.
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Indy_bueller
Posted on Tuesday, May 09, 2006 - 12:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Check the brake rotor bushings. Is there a clicking sound associated with the shaking?
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Fullpower
Posted on Tuesday, May 09, 2006 - 12:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

mine did that too, had a warped front rotor, dont know why. tried refinishing the rotor with very crude means: high speed die grinder with abrasive pad, also replaced brake pads a couple times, and adjusted steering head bearings carefully (twice) finally replacing rotor cured the problem. dealer actua;lly WARANTEED the warped rotor. pretty cool i thought.
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Buellerx
Posted on Tuesday, May 09, 2006 - 01:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Also check the steering head bearings. if they are not torqued properly, that will cause a vibration in the front end when braking.
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Buellistic
Posted on Tuesday, May 09, 2006 - 08:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Remove the PADS and rugh them up(BRAKE THE GLAZE) on a concrete drive way ...

Take BRAKE ROTOR CLEANER(cheapest you can get works just fine) and a clean rag and clean your ROTOR ...

DO THIS BEFORE YOU MAKE A MOUNTAIN OUT OF A MOLE HILL ...
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Pinball
Posted on Tuesday, May 09, 2006 - 11:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I got a new one under warranty,at around 3500kms.
It`s at 17000kms. now and going great!
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T9r
Posted on Tuesday, May 09, 2006 - 11:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I pulled the pads off and inspected them:
inside pad thickness: 0.10 in.
outside pad thickness: 0.07 in.
Lines on the pads could still be seen.

I roughed each pad up (scrubbing across concrete) and cleaned the rotor off with a strong cleaner. I'll test it tomorrow.
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T9r
Posted on Wednesday, May 10, 2006 - 07:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The test ride went well. A slight pulsation when front brakes were first applied, lightly. No harsh vibration during heavy front braking.

I'll keep an eye on it. Thanks!
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