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Buell Forum » 1125R Superbike Board » 1125R front brake rotoró-machining or replace? « Previous Next »

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Sunburntsnype
Posted on Monday, March 11, 2019 - 06:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Good afternoon guys,

I have an Ď09 buell 1125R, bought used about 9 months ago. itís in good shape, but well used. The front brakes have started squeeling on me so Iím gearing up to do a full brake job. I donít do any track stuff, jut use it for commuting and some fun twisters on the weekends. I was thinking of going with OEM replacement pads, unless you guys recommend something different.

My main question is, do I need to have the rotor machined down prior to putting new pads on? Is it even possible to get these rotors machined/turned since they are ďinside-out?Ē

If I canít get them turned and they are in need of replacement, where can I find a whole new rotor? Also where can I find or buy oem pads/parts?

Also if you guys have any other advice or useful info regarding doing the brakes on these, please let me know. Iím all ears!

Thanks,
Caleb
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Shoggin
Posted on Monday, March 11, 2019 - 10:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Machining? Like they did to car rotors in the 70's and 80's? To a motorcycle rotor?
I wouldn't.
Worst case:
If I need to take off some pad material that has transferred unevenly to the rotor face causing the always mis-diagnosed "warped rotor" feeling, I will use emery cloth sparingly to clean it, then re-bed the new brake pads properly. 8-10 times thats the problem with Buell's I have found.

You can get new parts from SPHDOnline.com or many other places depending on your location, Twin M/C in the UK. e-bay, etc.

Look into the Buell Racing brake rotor mounting kit. It replaces all the springs and such in your system now that can bind up and cause issues if left un-maintained.


https://www.buellxb.com/forum/showthread.php?48151 -EBR-Racing-front-rotor-install-instructions
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Nuts4mc
Posted on Tuesday, March 12, 2019 - 10:20 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sunburn...here's an link from the early days...Jdugger is the "Wizard of Whoa"...he used his 1125r as a teacher's bike in Texas...he has a lot of experience with the front brake set up...use the "google" link in color at the top of the page to find more links like this one...

http://www.badweatherbikers.com/buell/messages/290 431/590294.html?1283370778

the designers tried their best to make the rotating mass of the wheel and brake assembly as light as possible...the pot holes on Hwy 1 may give you a few flat spots on the rim as well as a twist/bend to the rotor...best bet is to use the upgrade hardware kit...make sure your rotor is flat...and if you want to give it a uniform finish...people have tried Jitter bug sanders to brake hones like this one:

https://www.amazon.com/Brush-Research-Flex-Hone-Fo r-Rotors/dp/B007SOW0WC

if you're new to the Buell 1125r family ...you may not be aware of it's attempt to race in World Super bike series...all of the racers who tried to race the mark changed the front end to a conventional (rice burner/Japanese bike) type set up with twin discs...

if you want more racing info...google "Pat Mooney motorcycle racer...here's an old article from Cycle World about Pat and his efforts:

https://www.cycleworld.com/v-twin-racers-ebr-1190r x-and-yamaha-tz250-comparison-review

hth
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