April 4th, 2016, 07:49 PM | #1 |
ninjette.org member
Name: Kris
Location: Las Vegas
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Rear brake dragging
So I'm in the process of putting my bike back together after swapping the rear suspension and getting new tires, and the inside pad is dragging very severely on the rotor. I've measured my axle to make sure its aligned but nothing changes regarding the brake dragging. Does the brake torque link have side to side play? I can't figure out why it's dragging now but not before.
It's difficult to see, but the right side of the image is away from the wheel, and the pad clears there with a lot of room. On the inside, towards the wheel, it's dragging.
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April 4th, 2016, 08:12 PM | #2 |
Daily Ninjette rider
Name: Hernan
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No play side to side for the torque link; its function is to restrain the caliper from rotating around the axis.
The support of the caliper is fixed. Across that support, the caliper slides, with its cavity located around the disc (about center if everything is OK). Each pad is free to move towards the disc, when under the pressure of the pistons, being a self-centering mechanism. Please, see: http://faq.ninja250.org/wiki/Brakes http://www.aa1car.com/library/2005/ic80560.htm
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April 4th, 2016, 08:15 PM | #3 |
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Name: Kris
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I'll have another look at it tomorrow, been frustrated with it all day. What would keep them from self aligning? Thanks.
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April 4th, 2016, 08:56 PM | #4 |
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Name: Hernan
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Rusted or worn or deformed pins/guides.
The pins should be flat, straight, clean and lubricated. The caliper floats and clamps the disc between the pads, when pressure acts on the pistons. When there is no pressure, the caliper self-retracts and pads put no pressure on the disc (some light drag/noise is normal). If you cannot move the caliper side to side when there is no pressure in the system, something is wrong.
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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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April 5th, 2016, 02:37 AM | #5 |
ninjette.org member
Name: Corey
Location: Minneapolis
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Take the caliper free from the brake stay and re-install pads/caliper. I did the same thing first time i put the rear wheel back on. That back brake is what I would consider "finicky" compared to any other bike I own. I'm going to guess the pads are messed up inside there (not on quite right) and dragging.
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April 5th, 2016, 07:30 AM | #6 |
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Name: Kris
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That's what I was thinking, I'm going to try that. Thanks.
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April 5th, 2016, 08:33 AM | #7 |
n00bie to wannabie
Name: Bill
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Sometimes the little spring clip gets out of line and can jamb the pad. Check it's not out of position or bent askew which could bind the pad out of position.
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April 5th, 2016, 08:35 AM | #8 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
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A clean/lube/reinstall should fix your issue without much worry.
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April 5th, 2016, 08:36 AM | #9 |
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Name: Kris
Location: Las Vegas
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Thanksa guys, I'll get back to you all after I work on it. I won't forget the lube!
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April 5th, 2016, 08:42 AM | #10 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
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Cool!
A note about the cleaning... There is a hole in the pad that the slide pin goes through. Along with cleaning/lube the slide pin, check the hole in the pad for buildup of brake dust. And another thing about slide pins. Since it's a floating system, they can get wear grooves worn in them. This groove may cause the pad's metal backing to catch, preventing the pad from moving. Thus... causing drag. If you find you have grooves, you can try to sand them out, but slide pin replacement is more recommended.
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April 5th, 2016, 12:38 PM | #11 | |||
in your machine
Name: Scott
Location: Summer Shade, Ky.
Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot.
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Service the caliper and sliders.
Write-up time I recommend that every time you change your pads, you service the calipers, he's my write-up to help you out. It should fix your initial problem, and keep your calipers in top working order. Quote:
I also recommend flush and fill with new brake fluid, also I'd go with 5.1DOT This is the one I use https://m.motul.com/ca/en-us/product...-1-brake-fluid Also inspect the brake lines, replace is needed, http://faq.ninja250.org/wiki/Stainle..._lines_upgrade Quote:
On my 91 EX500 I have Spiegler, in orange to match that bike. Quote:
When it comes to safety items like brakes, when in doubt, throw them out, it's your safety in your hands, and is cheaper than a visit to the ER. Buy quality pads,I personally recommend EBC brand either the HH, or the Extreme HH. EBC full floating rotor, replace the OEM rubber line with a stainless steel braided brake line, cheaper than replacing them with OEM. On my 500 I have Spiegler line http://www.spieglerusa.com/brakes/cy...line-kits.html On my Ninja 250 i went with Venhill http://www.venhillusa.com/products.html With all that, it will stop on a dime, and leave you nine cents in change. look here http://ebcbrakes.com/products/motorcycle/ And also read this, http://www.ex-500.com/wiki/index.php...otors_and_Pads That should answer any questions you might have.
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April 5th, 2016, 12:49 PM | #12 |
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Name: Kris
Location: Las Vegas
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Awesome write up, thanks.
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April 5th, 2016, 12:55 PM | #13 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
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Np, hopefully it fixes your problem, and also avoid future issues.
One must remember that you only have one brake in a panic stop, hard stopping, the front does almost all of the braking. Keeping the brake system working perfectly is not an option, it should be the first priority.
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April 5th, 2016, 01:01 PM | #14 |
Vintage Screwball
Name: B
Location: Washington
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Another good brake fluid option that I use in all my machines now:
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April 5th, 2016, 01:08 PM | #15 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot.
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Flushing and filling with new fluid periodically is highly recommended, pick your favorite flavor.
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April 5th, 2016, 01:11 PM | #16 | |
Vintage Screwball
Name: B
Location: Washington
Join Date: Feb 2016 Motorcycle(s): 2011 Ninja 250, 2008 Ninja 250, 2019 KTM 1290SDR, 2017 FZ10 Posts: A lot.
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Quote:
Every spring I do this. Takes all of 20 minutes by yourself.
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April 5th, 2016, 05:21 PM | #17 |
ninjette.org member
Name: Kris
Location: Las Vegas
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The pad was catching on the little dog ears, all better now. Thanks guys!
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