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Topic: Brakes dragging after tire change (fixed!)  (Read 1788 times)
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jadziadax8
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« on: August 27, 2010, 06:03:17 AM »
I swapped out my Metzlers for a new set of PR2's.  After buttoning it all up, I noticed that my front brakes are dragging.  Not too bad, bike is rideable, but I'd like to figure out what happened.  I've taken brakes off before with no ill effects.

Do the pads need time to bed again?  Is it possible the spacers are backwards?  Will this go away on its own?

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« on: August 27, 2010, 06:03:17 AM »
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« Reply #1 on: August 27, 2010, 06:44:16 AM »
Quote from: jadziadax8 on August 27, 2010, 06:03:17 AM

I swapped out my Metzlers for a new set of PR2's.  After buttoning it all up, I noticed that my front brakes are dragging.  Not too bad, bike is rideable, but I'd like to figure out what happened.  I've taken brakes off before with no ill effects.

Do the pads need time to bed again?  Is it possible the spacers are backwards?  Will this go away on its own?

Edit- Dammit, logged on as teh spouse...


It's likely a spacer issue, or something misaligned. The pads shouldn't have changed in terms of spacing, etc.
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« Reply #2 on: August 27, 2010, 07:31:44 AM »
If you depressed the pads in to the calipers to have more room to mount the rim you may have some dirt/debris hanging the pistons up.  get some brake cleaner and go to town.
I would also recommend loosening the pinch bolts and axle.  Push up & down a few times on the forks and tighten everything up again.  This will cure any binding.  You do this with the front tire on the ground.  
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« Reply #3 on: August 27, 2010, 08:46:29 AM »
I will try that today.  Thanks!
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« Reply #4 on: August 27, 2010, 09:19:17 AM »
Put front wheel on a front stand.
Loosen axle nuts and swing arm axle holder just a bit.
Spin wheel.  
Hit the front brakes quickly.
Repeat 1-2 times.

Snug bolts back up.

You can use the brakes to allign the front wheel so they do not rub.
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« Reply #5 on: August 27, 2010, 12:32:18 PM »
Quote from: TuffguyF4i on August 27, 2010, 09:19:17 AM

Put front wheel on a front stand.
Loosen axle nuts and swing arm axle holder just a bit.
Spin wheel.  
Hit the front brakes quickly.
Repeat 1-2 times.

Snug bolts back up.

You can use the brakes to allign the front wheel so they do not rub.


+1 you simply have the fork tube misaligned, simple fix Wink
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« Reply #6 on: August 27, 2010, 12:56:11 PM »
Or you may be riding an AJS CSR. In which case, a large hammer generally helps to line things up.
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« Reply #6 on: August 27, 2010, 12:56:11 PM »

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« Reply #7 on: August 28, 2010, 12:01:06 PM »
Well, cleaned the brakes up real good and tried this:

Quote
Put front wheel on a front stand.
Loosen axle nuts and swing arm axle holder just a bit.
Spin wheel.  
Hit the front brakes quickly.
Repeat 1-2 times.


Worked perfectly.  Until that last quarter turn to torque it to spec.   Headscratch

Papa, lend me yer hammer.
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« Reply #8 on: August 28, 2010, 12:02:36 PM »
All yours. The lump hammer, the maul or just the teensy weensy engineering hammer?
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« Reply #9 on: August 28, 2010, 12:04:37 PM »
Quote from: Papa Lazarou on August 28, 2010, 12:02:36 PM

All yours. The lump hammer, the maul or just the teensy weensy engineering hammer?


Are they right handed or left handed?
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« Reply #10 on: August 28, 2010, 12:21:34 PM »
Quote from: mxvet57 on August 28, 2010, 12:04:37 PM



Are they right handed or left handed?


No idea. I only let my Lombard slaves touch them.
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« Reply #11 on: August 28, 2010, 12:58:18 PM »
Great, Lombard is the next town over.

Forks are delicate and precise, so I'll need the great big maul.




I think what I'm gonna do is go to the guys what adjust suspension at the track day on Labor Day, and see if they'll have a gander.
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« Reply #12 on: August 28, 2010, 01:29:13 PM »
Any chance you mixed up wheel spacers? Also when assembling front ends/wheels I snug the axle nut,install calipers and hold the front brake and bounce the forks a few times and then torque things.
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« Reply #13 on: September 02, 2010, 10:24:44 AM »
Well, I'm still having the same trouble- maybe.

My spacers are the same part number, so it's not a spacer issue.  I did bounce the forks and the wheel is a little more free.  I can get one full rotation if I spin the wheel on the stand.  Before, I could only get half a rotation.

I know all brakes drag a little. Is that a normal amount of drag?
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« Reply #13 on: September 02, 2010, 10:24:44 AM »

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« Reply #14 on: September 02, 2010, 10:43:57 AM »
Probably not.
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« Reply #15 on: September 02, 2010, 10:51:11 AM »
Quote from: Fourstring on September 02, 2010, 10:24:44 AM

Well, I'm still having the same trouble- maybe.

My spacers are the same part number, so it's not a spacer issue.  I did bounce the forks and the wheel is a little more free.  I can get one full rotation if I spin the wheel on the stand.  Before, I could only get half a rotation.

I know all brakes drag a little. Is that a normal amount of drag?



Nobody ever listens to me...
Loosen pinch bolts, loosen axle a bit, push up and down on the forks.  Tighten axle bolt, tighten pinch bolts.
Don't put it on a front stand.
If this doesn't work, it's your brakes.
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« Reply #16 on: September 02, 2010, 10:54:22 AM »
Remove your brake calipers and spin the wheel. If it spins good, it's something wrong with the brakes. if it's still sluggish, I'm thinking it's something like a speedo hub. Is it the ZX9? Does it have a cable running to the speedo hub? If it's not lined up just right, it'll spin, but not freely. The next thing ya know it'll cook the front wheel bearings.
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« Reply #17 on: September 02, 2010, 11:46:45 AM »
Quote from: J-Mac on September 02, 2010, 10:54:22 AM

Remove your brake calipers and spin the wheel. If it spins good, it's something wrong with the brakes. if it's still sluggish, I'm thinking it's something like a speedo hub. Is it the ZX9? Does it have a cable running to the speedo hub? If it's not lined up just right, it'll spin, but not freely. The next thing ya know it'll cook the front wheel bearings.



No.  A misaligned wheel will spin fine if it's not spinning against a fixed surface (Like brake pads).
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« Reply #18 on: September 02, 2010, 12:10:45 PM »
You guys are  rofl
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« Reply #19 on: September 02, 2010, 12:15:49 PM »
I'll bet I'm right about the speedo drive. We'll find out soon enough. Bigok
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