Braking Question..what do you think

[VirginiaJim]

I think the 11+ models all come standard with the linked business.   The 10's had it as an option.  08/09s only had no abs or abs...no linking.  With linked brakes, I don't think it makes much difference if you use the lever or the rear brake, it's distributed according to how you've set the mode button.  It's all very magical to me on how that works.  Suffice it to say we haven't seen many problems (mechanical/electrical), if any, on that system.  Some despise it but it is what it is unless Kwak central decides to change it in an up coming model.

[stevewfl]

this thread delivers 

[McJunkie]

Since it only happens during hard braking could it be the rear abs kicking in as the back end lightens up?

[CARLÃO]

Since it only happens during hard braking could it be the rear abs kicking in as the back end lightens up?

I think the kicking is caused by the ABS itself, as with the lever punching the hand, cause the system is controlling and distributing forces to the brakes, activating and releasing in milliseconds, maintening the trajectory the most stable possible.

[tjpgi]

Well I went to the dealer at AlamoPlex in San Antonio for the rear brake recall ( #2) yesterday and told them about my problem with the vibration ( pulsing) with braking. When I made the appointment, I told them I wanted them to measure run out on the rotors ( front and back) to look for warping. They did the recall, both technician and foreman tested the bike, measured the thickness and checked for warping of the rotors.

Run out on the rotors .007" and thickness is 4.95 mm. Both measurements in spec. They said the ABS kicking in is causing the vibration( pulsing). I have owned this bike since new for the last 4 years and something has changed. I will try cleaning the rotors s suggested by Brian and see what happens. They told me that the cost of checking the rotors would be $94 if there were no abnormalities requiring warranty work, but after all the work they did, the cost was "no charge". Go AlamoPlex...I have always been treated well by these guys despite the fact that I did not buy either of my bikes from them ( Concours and GSXR).

[koval68]

Well I went to the dealer at AlamoPlex in San Antonio for the rear brake recall ( #2) yesterday and told them about my problem with the vibration ( pulsing) with braking. When I made the appointment, I told them I wanted them to measure run out on the rotors ( front and back) to look for warping. They did the recall, both technician and foreman tested the bike, measured the thickness and checked for warping of the rotors.

Run out on the rotors .007" and thickness is 4.95 mm. Both measurements in spec. They said the ABS kicking in is causing the vibration( pulsing). I have owned this bike since new for the last 4 years and something has changed. I will try cleaning the rotors s suggested by Brian and see what happens. They told me that the cost of checking the rotors would be $94 if there were no abnormalities requiring warranty work, but after all the work they did, the cost was "no charge". Go AlamoPlex...I have always been treated well by these guys despite the fact that I did not buy either of my bikes from them ( Concours and GSXR).

And while you're at it, try cleaning abs sensors. I've had a similar problem with abs kicking in on my truck, by removing and cleaning all sensors problem was solved!

[jamiemac]

Well I went to the dealer at AlamoPlex in San Antonio for the rear brake recall ( #2) yesterday and told them about my problem with the vibration ( pulsing) with braking. When I made the appointment, I told them I wanted them to measure run out on the rotors ( front and back) to look for warping. They did the recall, both technician and foreman tested the bike, measured the thickness and checked for warping of the rotors.

Run out on the rotors .007" and thickness is 4.95 mm. Both measurements in spec. They said the ABS kicking in is causing the vibration( pulsing). I have owned this bike since new for the last 4 years and something has changed. I will try cleaning the rotors s suggested by Brian and see what happens. They told me that the cost of checking the rotors would be $94 if there were no abnormalities requiring warranty work, but after all the work they did, the cost was "no charge". Go AlamoPlex...I have always been treated well by these guys despite the fact that I did not buy either of my bikes from them ( Concours and GSXR).

It would also be worthwhile to go to harbor freight, and buy one of their inexpensive dial indicators. They work pretty good, but are not real durable like a name brand. Measure the rotor runout Yourself, and if You have access to a micrometer, also measure the thickness of the rotors at several points. Thickness variation in the rotor as it sweeps the pads will cause a vibration also. Sometimes, a more severe vibration is caused by thickness variation, instead of TIR (Total Indicated Runout) 

[Spanky]

I had a very similar experience with my 09. JamminJere cleaned my rotors with one of these:

http://www.braketech.com/index.php?option=com_content&view=article&id=83&Itemid=100

Totally fixed the problem. Just insert into your drill motor and gently place it against your rotors with the wheel off the ground so it can spin. Did a great job of cleaning the brake pad residue off the rotors and stopped the vibration under aggressive breaking.

[JamminJere]

Ive had pretty good luck with the rotor hone on a couple of our bikes with this problem.  Used at a fairly low rpm, you do have to loosen and flip the rotors to do both sides. Then flip back over again, and re-torque.  This is done with the wheel on the axle on jack stands, or with the front end up and the calipers removed and out of the way.  The trick is finding the right spot on each s ide of the wheel and the correct pressure to start the wheel spinning slowly so you are getting an even hone around the rotor. You can help keep the wheel spinning with your free hand or have someone help.

JJ

[tjpgi]

Thanks for the info, I'll try it.

[B.D.F.]

I use slightly different materials and equipment but it amounts to the same method Jerry uses and I too have had good success with it. Mine looks like this-



It is a paint removing disk mounted in a hand drill and used on the rotors as they spin slowly in a wheel balancer. The rotors have to be flipped around one time, just as with Jerry's method, to get both sides. The rotors and wheel will turn as soon as the sanding disk is touched to the rotor and it gives a very nice random pattern on the rotor.

It won't fix a warped rotor of course but it does work very well to clean the rotors once a year or so or everytime the brake pads or a front tire is changed.

Brian

Ive had pretty good luck with the rotor hone on a couple of our bikes with this problem.  Used at a fairly low rpm, you do have to loosen and flip the rotors to do both sides. Then flip back over again, and re-torque.  This is done with the wheel on the axle on jack stands, or with the front end up and the calipers removed and out of the way.  The trick is finding the right spot on each s ide of the wheel and the correct pressure to start the wheel spinning slowly so you are getting an even hone around the rotor. You can help keep the wheel spinning with your free hand or have someone help.

JJ

[JamminJere]

Thanks for the pics, Bri, yep except for my drill being red, that looks exacly the same!  :)

JJ

[B.D.F.]

Ah, so you have the second- fastest drill color, huh?

 

By the way, the rig I use is capable of reaching around behind the rotor so both sides could be done without unbolting and flipping the rotors. I just don't know of anyone other thank Kirby who has the brass to actually try it because when the tool wanders off the rotor a bit it is going to hit the inside of the wheel and it is a paint remover.... And I don't trust Kirby to do it ether.

Brian

Thanks for the pics, Bri, yep except for my drill being red, that looks exacly the same! 

JJ

[MGvaleri]

I do not agree that empirical solution, but with sandpaper coachbuilder and oil elbows.


http://i45.photobucket.com/albums/f82/BDF08012008/CleaningRotors.jpg


MGvalerio.