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Buell Forum » 1125R Superbike Board » Archive through September 11, 2015 » Front brake rotor is warped. « Previous Next »

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Heeltoehero
Posted on Tuesday, August 11, 2015 - 10:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Does anyone know if it is possible to get the front rotor turned? Mine has a bit of a warp to it. No visual defects in it. But surges pretty hard under front braking.
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Froggy
Posted on Tuesday, August 11, 2015 - 10:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It is unlikely the rotor is warped. What usually happens is brake dust and other crud build up in the mounting hardware causing the disk to be off center. Thoroughly cleaning the mounting hardware or replacing it can cure that.

The other cause is deposits on the surface of the rotor, which is usually due to holding the front brake right after stopping hard. The rotor can also be cleaned to remove the deposits, and using the rear brake to hold the bike at stoplights will prevent that from happening again.
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Mhpalin
Posted on Tuesday, August 11, 2015 - 10:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

More then likely it's brake deposits on your rotor you can clean them up I bead blasted mine no more surge.Some have used sand paper on them and that has worked so try cleaning them up first
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Shawns
Posted on Tuesday, August 11, 2015 - 11:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You can pop it off and see if it's straight. Mine was far from it.
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Sprintst
Posted on Tuesday, August 11, 2015 - 11:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Get a brake hone to resurface it

Won't fix a warp, but will fix deposits



http://www.flexhoneblog.com/2012/01/flexible-honin g-for-motorcycle-brake.html
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Terrys1980
Posted on Wednesday, August 12, 2015 - 05:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Get some good HH pads installed, get the rotor wamr, do a few hard stops and they will wipe the deposits right off!

Scotch brite pads and some WD-40 works for cleaning the rotor as well.

Could be a good time to upgrade to a more efficient rotor like Braking or Galfer. The Galfer can probably be bought for around $215.
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Heeltoehero
Posted on Wednesday, August 12, 2015 - 12:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks for the information yall. Just picked the bike up a few days ago wanting to make it right before riding it to much.
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Fresnobuell
Posted on Wednesday, August 12, 2015 - 02:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What they said.....many moons ago I took my R in under warranty because I had pulsing at the lever, probably like you are experiencing. The tech cleaned it with something and it was perfect after that.

I think soft braking is the reason for buildup. That's my guess anyway.
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Terrys1980
Posted on Wednesday, August 12, 2015 - 03:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Composite brake pads and holding the brakes when stopped at a light are the two main causes.
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Thefleshrocket
Posted on Wednesday, August 12, 2015 - 06:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Here's a how-to from Stoptech for removing deposits from rotors.

http://www.stoptech.com/technical-support/technica l-white-papers/uneven-pad-deposit-removal

As Terrys1980 mentioned, some grippier, more-abrasive pads using an HH compound will do a better job of removing deposits. In addition, grippier pads will typically be less-prone to leaving deposits on the rotor in the first place. I'm a big fan of the Dunlopad (DP Brakes) pads, part number SDP993.
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Sprintst
Posted on Wednesday, August 12, 2015 - 11:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'll swear by the brake hone

#1 - designed for the job

#2 - super simple to use

#3 - I've used it for over a year now, great results each and every time
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Solson1041
Posted on Thursday, August 13, 2015 - 12:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Get out to a race track and you'll have those deposits scrubbed off in a lap or two!
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Zac4mac
Posted on Thursday, August 13, 2015 - 11:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have had very good results on several XB/1125 fronts by whacking the rotor at each mount boss lightly with a dead-blow or nylon mallet.
Takes 30 seconds.

Then re-bed the brakes, several hard stops from 70+mph.

Z
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