03 999s just be rebuilt (Not after a crash) I have a squeek coming from the front. The front end has new wheel bearings, brake pads, brake seals and brake pistons. The squeek is noticeable to say 5mph but once up to say 15 mph it disapears or rather the wind noise takes over, if I have it on the paddock sttands and spin the wheel I hear nothing. The wheel is straight and true to the rest of the bike. Anyway on Saturday the squeek turn in to what I can best discribe as a loudish graunching. Imagine if a plastic bag had gotten caught in the front, it sounded a little like that. Graunch Graunch Graunch. I stopped and checked it out and cant see anything untoward. Its got me beat
Try removing callipers and see if it is still there? After that loosen pinch bolts on nut side and drop torque vale of nut by half check if still there. If not check if forks did not twist in yokes as that would apply pressure on bearing in uneven way. Finally when your wheels were refurbished did you put the hub spacer back in before fitting bearings? I had the same noise on my back wheel when bearings failed as my inner wheel spacer was not there (do not ask). My question your 999 has Showa forks? If so what is Nn rating for pinch bolts? What is for spindle nut?
I'm guessing you put a thin smear of copaslip on the back of the pads before you fitted them? Another thing can be the leading edge of the pads being very sharp, enough to make them howl in some circumstances, a very gentle rub with a file on the edge at 45 degrees should do the trick.
If I can not hear it it's not there approach Before you go filling down your pads just remove the callipers, cable tie them to frame and go for 5 mph ride. If it is gone then you know it is something to do with brakes.
I loosed the pinch bolts and nut and whilst spinning the wheel I noticed the RH disc is ever so slightly warped, we are talking about 1mm over about 1/8th or could be 1mm over 7/8th of the disc have not worked that out yet!!. I also noticed that the front outside pad has worn more than the rest (4 in each caliper). I dont have a sticking piston as all moving parts and new and in good working order.
As it is such a low speed, knock your pads right back, try it at that speed and stop using your rear brake. But as it only appears to be noisy when the weight of the bike is on the wheel I'd be looking again at wheel bearing or something in that area.
Im thinking its brake relaited once I have the calipers off and have the wheel spinning its lovely and free with no signs of anything. The wheel bearings are brand new SKF bearings with less than 100 miles on them.
Just as a matter of interest Mr C, what was the mileage on those discs? Looks like you found the cause of your noise though so all good in the end. BTW can you feel them oscillating through the lever?
If they are the original discs to the bike they have done 14k, I can feel nothing untoward through the lever. All I can think is the new pads etc have helped to bring to light a dodgy disc. I still have the old pads which have about 1/3rd life in them so just out of curiousity I will refit them just to see what happens
Possible stupid thought, are all the bobbins which make the discs float moving freely? They can seize up, meaning disc doesn't run true. Just a thought
Of course they are floaters, just not the FULL floaters that Ducati put on specials like the SL, SP series etc......the bobbins CAN get seized up and frequently do.
Ok so full floaters have a rattle to them I would expect semi floaters to have slightly less movement/rattle? but some kind of movement/rattle?? Stop the press.. Just been doing my Google homework :biggrin: Everydays a school day
