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Discussion Starter #1
I have an s4r that i got in sep. after about 50 mi. I got a vibration when using the front brakes.I took it back to the dealer they looked at it and said they could not find anything wrong.I said I would see if it improved and bring it back at the 600 mi. service.It only got worse.They did the service ($350) and changed the brake pads.The problem only got worse.I brought the bike back today after a bullshit song and dance of stupid explanations they finally agreed to change the rotors all the while saying they can't promise anything and complaining that the rotors cost $850 each.I finally left and I am hopeing for the best.Has anyone had simular problems.I am losing my mind.really hating ducati right about now.Please help.Thanks Dennis.
 

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Discussion Starter #3
thanks starting to feel a little better. I have been nothing but nice to these people.I guess they just do biusness this way.Thanks agian.
 

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Probably just a warped or hot-spotted rotor. Not a big deal unless your dealer makes it one.
 

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Actually, I've had this problem also. After stressing about it for a while, doing rotor check, and sanding brake pads. It turns out that it needed some compression damping at the bottom of the forks. I guess on a hard stop with the front brakes, it would come close to bottoming out. It happenned even more when I was stopping downhill.

Anyway, problem solved, give it a try.
 

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make sure you break in the new rotors correctly. Hard braking in the first 50 miles can cause warping of the rotors. Treat them with care.
 

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I had severe shudder at low speeds on both my S4 and current S4r. It can be really a problem on low speed downhill
hairpins. On the S4 the dealer changed the rotors but the problem reoccured then went away. I have the same thing with the S4r now think it is some issue with the pads or glazing of the rotors.
Usually downhill at very low speeds even sometimes just before stop in traffic. Be interested in any feedback.

Guy
Brisbane Australia
 

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Ya I have that problem in my m900 too. especially going downhill at slow speeds. I got the feeling it was the kind of problem that was unsolveable. Since my bike isn't under warranty, Im pretty sure I am gonna have to live with it.

If there were a easy solution I would be glad to hear it.
 
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Both of you guys have the same problem I fixed with new rotors. I didn't have them turned, because I felt it to be a warranty issue. YOU should have them turned. The minimum thickness is stamped on them, and any machine shop with a lathe should be able to true them up.
 

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Thanks for the input Herb, if the problem is with the rotors why is it only at very low speeds and intermitant? My S4r is still under warranty but cant see the point of changing the discs as previously on the s4 a change did not solve the problem. Guy
 
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Some interesting points and I have certainly had rotor problems on many cars in the past but as many people in this thread have pointed out that it seems to be more predominant at slow speeds and especialy downhill.
This would tend to point towards suspension rather than rotor vibration. If the rotors were out or true then youd have the issue throught a much wider speed range ?...
 

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I'm having this problem on my s4r, too....makes a moaning sound.
 

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I'm telling ya, tighten the damping...

The forks actually come close to bottomming out, or so I was told. But it makes sense cuz it happens more when going downhill. Anyway, give it a try
 

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My S4R also moans at low speeds. I just assumed it wants me to ride it faster. It must hate the city. Low speed down hills in traffic make it b!tch.
 

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I am not a brake suspension specialist, but I could understand the brake phenomenon being speed dependent also.
 

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Discussion Starter #19
dealer finally replaced rotors seems to have solved the problem. Happy again.Thanks for all the help.Dennis.
 
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