I have got a gsxr 750 k4 and i am suffering from a bad case of brake judder, it seem’s to happen just in the last part of braking just as you apply a bit more pressure to come to a stop, it is as if the whole bike is juddering, at higher speeds it dosent seem to happen.
My question is, is this a common problem to this model of bike?
Has anyone else experienced it and what can i do to cure it?
At the moment i can only think that the discs are somehow deformed
So at the moment the bike is booked in with the dealer for tuesday
Sounds like one of the disks is warped. At a walking pace apply the brake lever very lightly. If the lever “pulses” one or both of the disks are warped. As long as there’s no evidence of you riding off with a disk lock on or any accident damage around the disk area it should be covered under warrenty.
If the discs are warped you`ll feel it through the brake lever when braking.
Perhaps the pads are glazed and may need the shine taken off them, clean your discs too.
If this is happening when braking hard and in the last bit of braking, perhaps the forks are bottoming out.Dial in a bit of preload on the front suspension to see if it cures it.
When it first happened i took it back to the shop and they said the same the pads could be glazed, but it seems to have got worse in the past week, I dont think the discs are warped i think maybe they are not flat as if they have got a high spot on them
There is no pulsing through the lever though so i am a bit lost as to what it could be.
Youll be needing some pads at sometime so perhaps buy some and stick them in. High spot? never heard of that before... Headstock could be loose. Try raising the front of the bike off the ground. You could do this easier with 2 people. Get them to lean the bike over on its sidestand. You go to the front of the bike with steering straight and grab the lower fork legs, try to move forward and backwards, there should be no free play. If there is then its the headstock bearings are loose and will need tightening, unless in the unlikely event they`re damaged and need replacing.
I’ve done a bit of research on the web and this seems to be a bit of a common problem with explanations varying from discs to thin, weak springs in the caliper??,headstock tolerances incorrect,
Weak springs in the caliper, love it, hehehe…
Seriously though streetgang, i dont live far from you so if youre passing ill be happy to have a quick look, im as curious as you now.
I had a K4 750 and experienced the same thing when the pads were cold. If you let them warm up before braking hard, it should be fine. I also changed to Carbone Lorraine pads pretty quickly as well and those were stonking (SBK3’s).
Went round to B’s on saturday and he diganosed that the front forks were to soft and the juddering was the springs compresing and the tyre skipping on the road, B then twisted and poked and pulled and turned, and managed to sort out the front end, so the judder was hardley noticeble / nonexsistant.
I have now fitted new pads and given the discs a good clean and i havnt noticed any judder or vibration so i suppose only time will tell if the problem has been cured.
But many thanks to B for taking the time on saturday to help me out and explain what all the different adjusters do to the suspension, and setting my suspension up.
