Whining, wizzing sound from front brakes???

[Antigrav]

I got brand new tires for the track day this weekend... when I got the bike off the trailer I noticed wizzing, whirring sound when I pushed the bike around. I noticed it at the track but really didn't think that much about it... So I noticed it again when I got home. So I put the bike on the fork stand and spun the front wheel... well there is a definate drag on the discs accompanied by the whizzing sound from the pads on the rotors. Rotors are straight but the drag seem quite significant and during the whole turn of the wheels (constant)... It sounds whizzy even moving the wheel a 1/2 inch and it as soon as the wheel turns....

My question is could they have done something to the spacers of the wheel... maybe switched them, or could they have put the rim on the opposite way it was when I brought it in? The issue is I never had such a whizzing sound before even pushing the bike around and the drag from the disc seems overly stong and the wheel won't spin more than a turn and a half with a good hard spin of the wheel...

I've never taken the wheel off before so I don't know what the spacers are like on this Ducati wheel.. I don't know if you can turn the wheel around since it has dual discs and it will still work. Something happened when getting my front tire changed and before I call them I want to know a bit more about the front end.... Any help is appreciated.

[hyperdookie]

Don't know if this will help.I do my own tires and take precautions to make sure everything goes back the correct way. In other words, I don't remember if if the spacers can be swapped(I don't think so) and I can't look at my bike right now because it's at my work.I do know that the valve stem on the front wheel should be pointing to the right so that should be enough to tell you if the wheel is mounted reverse. Also, try loosening the pinch bolts at the bottom of the forks, sit on the bike,grab the front brake and compress the forks a few times. Retighten pinch bolts.

[JCPakBikes]

It sounds like the brake pads friction against the disk and mine does it on my PS when i upgraded to the Discacciati Brake caliper. It also did does it on my Triumph when I change the caliper and the disk to Discacciati.
If you did a track day with the brakes doing this and it did not lock up on you chances are it is noying to worry about. You would have known there was something wrong pretty fast.

It sounds like a static electric zzzzzzih and the frequency will rise as the wheel spins faster right?
Well,
The position of the pads may have changed a bit when the wheels were put back on.
Check the Brake pad position in the caliper first with a visual inspection

Sometime a quick shot of air in the pads will take care of it but it may not go away.
or
You can massage the caliper pistons. This is a trick I learned from Discacciati
Remove the caliper from the wheel/disk
Open the brake Resv and remove some of the fluid.
take the caliper and push the brake pads all the way into the caliper.
You will notice the Resv will start to fill as you push the pistons back. make sure it does not overfill
Put a piece of wood or something between the pads and push the brake lever and the pistons will push out. careful the fluid in the resv does not go down too much allowing air into the lines. Adjust the fluid accordingly
Repeat and push back the pads/piston in again.
at this point you can clean the pads a bit with a light scuffing with sandpaper if you see any glazing on the pads
Put the caliper back on, be careful the pads don't fall out while putting the caliper back on. Make sure your hands are clean of fluid or grease when handling the brake pad surface.

Pump the brake lever and the brakes will return refill to the proper level.

This has worked for me on the PS but it does comeback now and then.

Hope this helps

JC

[johnchypermotard]

very common for pads to drag after you remove and replace the front wheel, as you have probably moved the calipers off center in relation to the rotors.

try this to see if it helps (it works for my hyper):

• loosen the caliper bolts, so that the calipers can "float"
• pull and hold the front brake lever and tighten the caliper bolts snug (you can torque them to spec after you release the front brake lever if your doing the job yourself)
• repeat process on second caliper

this process will center the caliper (and pads) to the rotor, and should reduce/remove the pad drag, and the whining, wizzing sound.

[Warp Racer]

Originally Posted by johnchypermotard

very common for pads to drag after you remove and replace the front wheel, as you have probably moved the calipers off center in relation to the rotors.

try this to see if it helps (it works for my hyper):

• loosen the caliper bolts, so that the calipers can "float"
• pull and hold the front brake lever and tighten the caliper bolts snug (you can torque them to spec after you release the front brake lever if your doing the job yourself)
• repeat process on second caliper

this process will center the caliper (and pads) to the rotor, and should reduce/remove the pad drag, and the whining, wizzing sound.

I like the reasoning behind that. I never had to do it on my 04R1 and I have removed the front wheel and calipers many a time, but then again I never had to contend with monoblocs.

[Antigrav]

Wow, those were all relevant and good answers... love this board for that reason.... I will check it out..thanks for the insights.

[disgo duc]

+1 on that going to try that this morning mines been doing that ever since i rebuilt my forks kind of rubbish sound when i roll the bike slowly...thanks a million!

[dave2riff]

If it turns out not to be the brake drag, I had a whirring/whizzing sound from a
bearing in my (expensive) rear Talon hub on my Supermoto. Noticed it rolling
around in the garage, too. Had to send the damn thing back (since it was
brand new) and have a new bearing inserted. At first I thought it was the
rear brake, but after pulling the caliper, the sound was still there. Doh!