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Thread: front wheel shake when braking

Created on: 10/10/13 01:42 PM

Replies: 12

mre14


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Joined: 07/10/09

Posts: 159

front wheel shake when braking
10/10/13 1:42 PM

So I know there is a common rotor warp problem but I had 2 separate ppl check and tell me it didn't look like my rotors were warped.... I have the 08' 14 .... and upon braking I get A LOT of feedback, shake, shimmy, vibration, whatever you want to call it... but it only happens after I've been riding for a little while... I was told that if my rotors were warped I would have play in my brake lever, yea well I have NO PLAY in the brake lever... it brakes as soon as I apply pressure!

What say you? Did I leave anything out? still have plenty of meat on the pads



1995 ZX-9 custom paint; 2008 ZX-14 Atomic Silver 2018 ZX-14 Grey Black Orange you glad I didn't say yellow

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Hub


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Joined: 02/05/09

Posts: 13917

RE: front wheel shake when braking
10/10/13 2:06 PM

Worn front tire. How many miles on the tire? Rear has no effect, nor that tire wear. We want to see some stepping or cupping in the center of the tire. Since you brake upright, ride upright, wear the tire in the center, see where they missed that, they go looking for a pedal that doesn't pulse.



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Grn14


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Location: Montana

Joined: 02/25/09

Posts: 15511

RE: front wheel shake when braking
10/10/13 5:21 PM

"So I know there is a common rotor warp problem but"..no,there isn't a common warp problem.The brakes grab SO GOOD the tire gets fried.THAT's whats going on."do not apply brake firmly in the first 100 miles"....on any tire on the 14.


* Last updated by: Grn14 on 10/10/2013 @ 5:22 PM *

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nasty


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Location:

University of Okoboji

Joined: 04/13/13

Posts: 1657

RE: front wheel shake when braking
10/10/13 5:44 PM

do not apply brake firmly in the first 100 miles"....on any tire on the 14.

I drive too fast to not grab the brake hard!



2013 Super Fast SE ZX14R
Forever Fearless

“There's a rebel lying deep in my soul. Anytime anybody tells me the trend is such and such, I go the opposite direction. I hate the idea of trends. I hate imitation; I have a reverence for individuality.”
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Danno


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Location:

Southwestern Illinois

Joined: 12/18/11

Posts: 2142

RE: front wheel shake when braking
10/10/13 5:45 PM

I know a few riders who have had to replace rotors on ZX- and especially C-14s. The problem seems to be worse on the heavier Concours and haven't heard too much about it on R models (yet). One guy I know was about to replace the rotors and I told him how to free up the floater rivets (buttons) and it cured his particular problem. If you try this and the lever still pulses, there is a problem. A shake or shimmy is more likely the tire, but if the lever pulses, it's the rotors.



'07 CPB Blue; ZGST windscreen with MRA X-screen adjustable spoiler, tube bar adaptor, PC III, ATRE,BMC air filter, modified stock seat with 2nd Look cover,Scorpion Flame Ti slip-ons, Galfer rotors front and rear, braided-stainless lines, C-F 10R front fender, C-F hugger, C-F inner fairing panels, painted foreman's fins with faux C-F inlay, polished rim lips wired for heated gear and accessories, Givi V35 side bags and E41 topcase with SW-Motech qd mounts

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Danno


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Location:

Southwestern Illinois

Joined: 12/18/11

Posts: 2142

RE: front wheel shake when braking
10/10/13 5:54 PM

Here's the drill on freeing up the rivets (buttons) Remove the rotors and lay them flat. Put a drop of penetrant such as Kroil or some other of that type of product on each rotor/button/carrier junction and let it work it's way in for a few hours. Then make a tapered hardwood dowel (some like to use a socket extension, but that's crude to me) and jam it into each button and twist to get them to spin freely. These are semi-floating rotors, so they're never gonna rattle around like the buttons on a full-floating rotor, but they should be free to move. Once you've got them all spinning, thoroughly degrease and wash out all the penetrating oil. Air dry and then reassemble the rotors on the wheels, put the wheels bsck on the bike and take it for a test ride. If the lever still pulses, the rotors are warped and only replacement (preferably with aftermarket rotors) will cure the problem.



'07 CPB Blue; ZGST windscreen with MRA X-screen adjustable spoiler, tube bar adaptor, PC III, ATRE,BMC air filter, modified stock seat with 2nd Look cover,Scorpion Flame Ti slip-ons, Galfer rotors front and rear, braided-stainless lines, C-F 10R front fender, C-F hugger, C-F inner fairing panels, painted foreman's fins with faux C-F inlay, polished rim lips wired for heated gear and accessories, Givi V35 side bags and E41 topcase with SW-Motech qd mounts

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wfozx14


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Location:

Upstate New York

Joined: 12/16/12

Posts: 891

RE: front wheel shake when braking
10/10/13 6:36 PM

I had the same exact problem that your describing and was able to fix it by freeing up the buttons on the rotors. I wasn't able to get them to free up with a tapered wooden dowel, I used a ez out in my cordless drill. The ez out did leave some very small marks but nothing anybody would ever notice. If a dowel works for you that'd be the best. Make sure you use some kind of oil to lube up the buttons, also spray some lube in there as your spinning the buttons to flush out any debris that's stuck in there.

I also used a 3m/ scotchbrite pad on my die grinder and cleaned up my rotors where the pads ride.

Also put on new pads even if the current ones look good. And that's all I did, it's been over 6k miles of hard aggressive riding/braking and there still perfect. Also the rotors have locktight on the bolts that you'll have to heat up before removing them.



Ohlins forks,Ohlins shock,GPR steering damper, Brembo brake master cylinder/lever,Brembo clutch cylinder/lever,vortex rearsets, Two Bros carbon race series 4 into 1 exhaust,Dunlop Q3's,galfer ss brake/clutch lines, V1 radar detector,zumo 550 gps,auto com communication,PDM 60 power distribution module,zero gravity DB wind screen, vortex rear sprocket,EK zzz chain, Carpenter racing CCT, Romans flash, Annitori racing quickshifter.

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Hub


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Joined: 02/05/09

Posts: 13917

RE: front wheel shake when braking
10/11/13 12:04 AM

... and upon braking I get A LOT of feedback, shake, shimmy, vibration, whatever you want to call it... but it only happens after I've been riding for a little while...

I missed this.

1. I've ran about half a tank and that is riding it for awhile.
2. I'm riding piss out of it using the brakes a lot and then it starts.

Which is it? A warmed up tire or a hot set of disc?



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mre14


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Joined: 07/10/09

Posts: 159

RE: front wheel shake when braking
10/11/13 8:23 PM

Thank you everyone for the info... I did check the tire for the lumps... with the tried and true "Rub Your Hand Down Her Method", where you rub your hand on the front tire looking for lumps. There were none, and it does only do it upon braking!

Hub, within less than a half a tank with moderate front braking it will start doing it! Unfortunately the weather here SUCKS, but suppose to have a good day or 2 next week. So I will take her out then to better be able to define when it does it!

At Danno & WFozx14 its not a shake in the handle bars, just a pulsing in the brake lever. So should my next course of action be to free up the rivets? Thank you for this, I didn't know abt freeing up the rivets!!



1995 ZX-9 custom paint; 2008 ZX-14 Atomic Silver 2018 ZX-14 Grey Black Orange you glad I didn't say yellow

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wfozx14


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Location:

Upstate New York

Joined: 12/16/12

Posts: 891

RE: front wheel shake when braking
10/12/13 6:24 AM

Hmmm...mine shook the bars pretty bad so your problem sounds different than mine was. Maybe your brake fluid is shot, I change mine every year. That's something cheap and easy you could try.



Ohlins forks,Ohlins shock,GPR steering damper, Brembo brake master cylinder/lever,Brembo clutch cylinder/lever,vortex rearsets, Two Bros carbon race series 4 into 1 exhaust,Dunlop Q3's,galfer ss brake/clutch lines, V1 radar detector,zumo 550 gps,auto com communication,PDM 60 power distribution module,zero gravity DB wind screen, vortex rear sprocket,EK zzz chain, Carpenter racing CCT, Romans flash, Annitori racing quickshifter.

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ErikR



Joined: 03/28/09

Posts: 23

RE: front wheel shake when braking
10/12/13 7:44 AM

mre14, I had a very similar issue with my '09. At 20-something thousand miles I noticed a lot of pulsing in the brakes. I rode it that way for a long time. I also was thinking it might be warped rotors. I never thought to check the buttons that hold the rotors to the carriers.

At 29,600 miles, I replaced the original front pads, which still had plenty of life left, with EBC FA417/4HH pads. Now, it stops great! No more shake or pulsing. I have over 20,000 miles on the EBC pads and they still work like new...

I have to ask, have you've had the front wheel off recently? I wouldn't be surprised if my pulsing came from a wheel that was incorrectly installed. The service manual gives the correct sequence of bolts to be tightened, and front end to be bounced.. This may or may not resolve your problem, but I'd start with pads before I dropped big $$$ on rotors.

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KAK



Location:

rockandahardplace

Joined: 02/16/09

Posts: 761

RE: front wheel shake when braking
10/12/13 9:27 AM

On my '07 with the original tires, my front end started shaking while braking. My front tire was about 1/2 worn. It was most noticeable when braking at about 60 mph and was much less noticeable at 40 and below.
I was 99% sure my rotors were warped though I found it hard to believe because I'm easy on brakes. Some here said the tire was at fault. I doubted it but decided to change tires. The new tire completely eliminated the wobble/shake.
I'm still not sure why the shake happens, but I suggest new tires.

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Hub


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Joined: 02/05/09

Posts: 13917

RE: front wheel shake when braking
10/12/13 1:46 PM

Is there more than 3k on the tire? 8 years of the same parts up front, look at the non-complaints. So to say the loose discs will solve the problem when you are looking at a 50/50 kind of guesswork ?



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