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July 5th, 2014, 12:40 PM
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#1 |
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ninjette.org member
Name: Ralph
Location: Baton Rouge, LA
Join Date: Jun 2013 Motorcycle(s): 2004 EX250 Posts: 12
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Rear Brake Question
I had my local shop replace my rear brake about a year and a half ago. Yesterday, it fell out of the rotor and it looked like it does in these pictures. In addition, the rotor was all discolored as you can see.
Before I replace the brake pad, should I clean the rotor? Should the shop replace it for me? I didn't think the brake pad should have worn out that quickly. |
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July 5th, 2014, 12:49 PM
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#2 |
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ninjette.org member
Name: Ralph
Location: Baton Rouge, LA
Join Date: Jun 2013 Motorcycle(s): 2004 EX250 Posts: 12
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Here are the pictures:
The first and third are the completely worn down brake pad. The second picture is of the rear rotor. |
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July 5th, 2014, 01:14 PM
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#3 |
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Certified Troublemaker
Name: Teri
Location: Hamilton, NJ
Join Date: Oct 2012 Motorcycle(s): 2006 Ninja 250r "Pikachu", 2017 Ninja 650 "Epona" Posts: A lot.
MOTM - Aug '13, Aug '14, Feb '17
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If it was my bike i think i would replace the rotor, not just clean the old one...
Hell, if my cars rotors looked like that i would change them...
__________________________________________________
 Raven's Rejuvenation   A bruise is a lesson... and each lesson makes us better... |
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July 5th, 2014, 01:20 PM
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#4 |
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ninjette.org guru
Name: mike
Location: jackson, nj
Join Date: Jun 2009 Motorcycle(s): 2008 ninja 250 Posts: 271
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Also check to make sure it is not sticking
Because of the Pistons are sticking it'll constantly wear mine was stuck and exhibited a slight pull to the right side.
Just make sure once you get the pads back in that it spins freely |
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July 5th, 2014, 01:21 PM
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#5 |
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The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much.
MOTY 2015, MOTM - Nov '12, Nov '13
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Measure the thickness of the rotor + compare to specs and check it's straightness. If both are good, the no replace. Just lightly sand with new pads w/ a good bleed and bedding and you should be straight.
__________________________________________________
Goal: Shake A Million Hands | Look through the corners | Track Day Prep | Closest track? | The Mid-Ohio School |
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July 5th, 2014, 01:31 PM
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#6 |
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ninjette.org guru
Name: mike
Location: jackson, nj
Join Date: Jun 2009 Motorcycle(s): 2008 ninja 250 Posts: 271
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Also check to make sure it is not sticking
Because if the Pistons are sticking it'll constantly wear your brake pads out.
My rear caliper was stuck and exhibited a slight pull to the right side with no pressure applied to either side of the handlebars. Just make sure once you get the pads back in that it spins freely. You can use the rear shock as a jack point. Then just spin it with your hand. |
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July 5th, 2014, 06:59 PM
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#7 | |
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Daily Ninjette rider
Name: Hernan
Location: Florida
Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot.
MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16
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Quote:
 http://en.wikipedia.org/wiki/Tempering_%28metallurgy%29  Too much heat has been there, probably damaging the parts of the caliper and the brake fluid. I would take it to a professional shop for evaluation of the disc and caliper and for a full replacement of the brake fluid. Check this thread out for replacements: https://www.ninjette.org/forums/showthread.php?t=186735
__________________________________________________
Motofool  .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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July 5th, 2014, 07:28 PM
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#8 |
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Captain 2 Sexy
Name: Newton
Location: South TN
Join Date: Apr 2014 Motorcycle(s): Kwaka EX250 Posts: 241
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That's a lot of heat.
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July 5th, 2014, 07:55 PM
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#9 |
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Down Under
Name: Linkin
Location: Sydney, Australia
Join Date: Jun 2014 Motorcycle(s): Kawasaki ZXR250C Ninja Posts: 296
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Replace disc/caliper/pads/fluid.
Previous owner of my bike ran the rear brake down to metal on metal, requires new disc 
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July 6th, 2014, 10:24 AM
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#10 |
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ninjette.org member
Name: Ralph
Location: Baton Rouge, LA
Join Date: Jun 2013 Motorcycle(s): 2004 EX250 Posts: 12
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Wow.... that just looks delightful! Okay, thanks for y'all's help!
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