Just installed new gen rear wheel, brake problem?

Zombarian · July 31st, 2014, 02:13 PM

I shaved the rear caliper hanger the oft-cited 13mm and for the most part all slots in like one would hope, BUT when spinning the wheel on the stand I can just see the caliper move a little back and forth, the axle adjusters are even enough and everything SEEMS unwarped, so would brake pads and their seating be the sensible culprit?

Side note, I didn't have to change the torque arm at all, just left it unattached and loose, tightened the axle etc then the slop afforded by the loose nuts let me get it in place, the rotor rubbing happens regardless of the torque arm being connected or not.

Racer x · July 31st, 2014, 04:53 PM

Pictures would help. But it sounds like the rotor is amped if the caliper is moving.

Zombarian · July 31st, 2014, 06:03 PM

The variance is too small for me to find and take a photo at the same time so I'm not entirely sure what to photo.

Motofool · August 2nd, 2014, 04:56 PM

Quote:

Originally Posted by Zombarian

............when spinning the wheel on the stand I can just see the caliper move a little back and forth........

Laterally?

Zombarian · August 2nd, 2014, 06:36 PM

Quote:

Originally Posted by Motofool

Laterally?

Yes.

Motofool · August 2nd, 2014, 08:21 PM

Quote:

Originally Posted by Zombarian

Yes.

Then, your brake disc may be warped.

You can check it against a lateral fix point of reference.

Please, read this:
http://www.atlprorepair.com/services...disk-breaks-3/

Zombarian · August 2nd, 2014, 09:26 PM

For the record a warped disc was my first thought when noticing a braking component move unusually, after googling whichever words seemed to sum up my issues pads often came up as the culprit, as the rotor didn't scream I'm warped (beyond the more obvious caliper lateral movement) I thought it best to ask, esp as the pads have been used on a 16 wheel all their life and not a 17 ( seems to leave a few mm of pad surface unused against the rotor)
Another issue is it seams a new newgen rotor costs nearly as much as a 500 wheel, and supposedly the 500 wheel slots in with not too much (2mm?) work.

What would you do figuring you have a spare caliper hanger? ( I do) Order a new china rotor, new OEM ($$$) rotor, used (rotor) or a 500 wheel with a 500 rotor?

Bonus round, could a slightly unsquare spacer cause a wobble? as far as my mind can figure it would just make things crooked as long as the spacer isn't rotating, at which point it would be a bearing right? <- trying to eliminate the modified caliper hanger from the problem equation.

July 31st, 2014, 02:13 PM	#1
Zombarian ninjette.org member Name: James Location: urth Join Date: Mar 2014 Motorcycle(s): 04 ninja 250, 2010 klx 250sf, 86 gsxr 750 Posts: 21	Just installed new gen rear wheel, brake problem? I shaved the rear caliper hanger the oft-cited 13mm and for the most part all slots in like one would hope, BUT when spinning the wheel on the stand I can just see the caliper move a little back and forth, the axle adjusters are even enough and everything SEEMS unwarped, so would brake pads and their seating be the sensible culprit? Side note, I didn't have to change the torque arm at all, just left it unattached and loose, tightened the axle etc then the slop afforded by the loose nuts let me get it in place, the rotor rubbing happens regardless of the torque arm being connected or not.

July 31st, 2014, 04:53 PM	#2
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	Pictures would help. But it sounds like the rotor is amped if the caliper is moving. __________________________________________________ Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja

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July 31st, 2014, 06:03 PM	#3
Zombarian ninjette.org member Name: James Location: urth Join Date: Mar 2014 Motorcycle(s): 04 ninja 250, 2010 klx 250sf, 86 gsxr 750 Posts: 21	The variance is too small for me to find and take a photo at the same time so I'm not entirely sure what to photo.

August 2nd, 2014, 09:26 PM	#7
Zombarian ninjette.org member Name: James Location: urth Join Date: Mar 2014 Motorcycle(s): 04 ninja 250, 2010 klx 250sf, 86 gsxr 750 Posts: 21	For the record a warped disc was my first thought when noticing a braking component move unusually, after googling whichever words seemed to sum up my issues pads often came up as the culprit, as the rotor didn't scream I'm warped (beyond the more obvious caliper lateral movement) I thought it best to ask, esp as the pads have been used on a 16 wheel all their life and not a 17 ( seems to leave a few mm of pad surface unused against the rotor) Another issue is it seams a new newgen rotor costs nearly as much as a 500 wheel, and supposedly the 500 wheel slots in with not too much (2mm?) work. What would you do figuring you have a spare caliper hanger? ( I do) Order a new china rotor, new OEM ($$$) rotor, used (rotor) or a 500 wheel with a 500 rotor? Bonus round, could a slightly unsquare spacer cause a wobble? as far as my mind can figure it would just make things crooked as long as the spacer isn't rotating, at which point it would be a bearing right? <- trying to eliminate the modified caliper hanger from the problem equation.