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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through June 12, 2008 » Front rotor « Previous Next »

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Z5derek
Posted on Friday, May 16, 2008 - 10:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

my new 1125r has developed a pulsing and after some investigation i came to the conclusion that it ius 6-8 thousandths out the dealer said that that was within spec how do you figure? what are my alternatives
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Jaimec
Posted on Friday, May 16, 2008 - 10:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Do the ZTL2 brakes have the same issues with pulsing as the ZTL? If so, the issue is solved by changing your brake pads to one of the non-OEM brands. I don't know if Lyndall makes pads for the ZTL2, but they've solved the pulsing problem on all of the XB's of which I'm familiar...
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Spectrum
Posted on Friday, May 16, 2008 - 10:40 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

This is the same ole issue with deposit build up from the OEM pads. Just use some Scotch Bright and brake cleaner to remove deposits and the problem will be solved

I do this as regular maintenance every time I wash the bike.
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Ccryder
Posted on Friday, May 16, 2008 - 10:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Derek:
On my 12r I had some pulsation on the front rotor. I determined that it was not warped or "out" but, it had build up of pad material. After doing a number of hard stops the OEM pads cleaned off the rotor.

Fast forward to my 1125r. After 4,000+ miles, my front brake feels great! I learned from my 12r that passive braking can cause pad material to build up on the rotor. You don't need to do stoppies every time you stop but, dragging the brake during slow stopping can cause this problem.

Take it out and do some hard stopping (as hard as you are comfortable with) and see if this helps. Please be careful where you do this and the surface you do it on since it can create a hazardous scenario.
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Bigblock
Posted on Friday, May 16, 2008 - 06:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

FUnny, I've found the opposite with mine, that REALLY aggressive braking can lead to a pulsing feel.

I have noticed either that scotchbfite for sure fixes this, albeit temporarily, and also a bit of milder braking will sometimes set her right, as well.

I wonder what my "aggressive" and "milder" braking is compared to youse guys, and /or is it equipment related?
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Slypiranna
Posted on Friday, May 16, 2008 - 09:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mine with over 4k miles now doing very hard and very light braking under all street conditions feels fine.

Better than most Big Four open liter bikes that I'm akin to prior to the switch.

I'm very happy with the Buell's 11 front slow down method.

Seems kinda hard to take any sort of accurate measure on a floating rotor though?

It IS designed to "move" laterally with heat and wear.

I'm sure the tolerance to this measurement would surprise most in knowing for sure...but without a manual!!!

MANUAL!!! : ) Pretty Please?
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Nickcaro
Posted on Saturday, May 17, 2008 - 01:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)


o' man I wish I had posted that question 2 weeks ago, instead of running out and getting a new rotor... DOH!
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Chameleon
Posted on Thursday, May 29, 2008 - 01:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I also had problems with my original rotor.
Had the service manager at Destination Harley-Davidson/Buell in Puyallup, WA take it for a spin around the parking lot just after they closed and he said it's 'definitely warped'.
He was able to replace my rotor, pads & pins all under warranty.

Destination Puyallup is a fantastic dealer. Surely it helps that I've purchased 3 bikes in less than 1 year from them.
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Adrian_8
Posted on Saturday, May 31, 2008 - 07:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I am on my third front rotor on my ULY...38K...and the third is starting to get the pulsations..wish I had Brembos on it... this crap is very rare with them under normal conditions...
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Spectrum
Posted on Saturday, May 31, 2008 - 08:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Clean the deposit on a regular basis or change the pads as Jaimec mentioned and this is not a problem.
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Bigeasy
Posted on Sunday, June 01, 2008 - 12:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Buell Racing makes a 6 mm thick rotor for about 130$
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Spectrum
Posted on Sunday, June 01, 2008 - 08:24 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Art what's the thickness on the stock rotor and what's the weight difference?
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Chameleon
Posted on Monday, June 02, 2008 - 03:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Take it out and do some hard stopping (as hard as you are comfortable with) and see if this helps.

I tried this on my 1125R and did notice an improvement.
The last time I did it, I hit the brake so hard that the oil light came on! Went off after a couple revs to get fluid flowing again... Likely due to fluid leaking out the side of the clutch cover. Need to get that replaced. Dealer checking into it.
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Bigeasy
Posted on Monday, June 02, 2008 - 04:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I believe the sock rotor is 5mm thick but not sure. I dont think the extra weight would make much diff in the handling.
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Z5derek
Posted on Wednesday, June 04, 2008 - 02:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

OK guys i have tried most of the things suggested i cleaned the rotors with a scotch brite that made it better for a while. i have done some hard braking exersises(rear wheel in the air) this is great fun but it is hard to control when the front is pulsing. i want to try new pads before i buy a rotor but my local sources are coming up with nothing what do you suggest
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The_internet
Posted on Thursday, June 05, 2008 - 10:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

what i don't like about the front brake is that if im in a corner, say right hand and im a little hot, if i touch the front brakes the handlebars "pull" one way, then when i release the brakes it "pulls" the other way. makes me feel yucky to worry about it.


i know tag the back brake and push the inner peg down, but i also want to be able to brake thru a corner and not feel like im gonna low/high side it.
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Cataract2
Posted on Thursday, June 05, 2008 - 11:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Might want to check your suspension settings to make certain they're even for both forks. That can cause that if one side if off from the other.
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