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Thread: Saftey warning

Created on: 08/15/15 05:03 PM

Replies: 12

darryle


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Location: ontario

Joined: 02/15/09

Posts: 1185

Saftey warning
08/15/15 5:03 PM

Changed the fluid and bled the brakes, went smoothly, ordered a set of EBC HH pads the old pads had plenty of life left.installed new pads pumped up the brakes, everything seemed fine.Took her out .....I hate stoppies!The new pads being thicker then the old raised the fluid level this caused my brakes to require next to nothing lever imput. Bled off a little fluid now everything is ok



2012 14R,full hindle Evolution ,vortex rear sets,BST's with ceramic bearings,HID's,hyper pro damper and custom map 205.3 hp/120.2 torque

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VicThing


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Joined: 07/17/14

Posts: 2398

RE: Saftey warning
08/15/15 7:13 PM

Just changed my rims/tires I need new pads on the front. How are EBC HH compared to stockers?

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Grn14


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Location: Montana

Joined: 02/25/09

Posts: 15511

RE: Saftey warning
08/16/15 6:40 AM

"Bled off a little fluid now everything is ok"


Interesting.

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david5525


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Location: Kirkland WA PNW

Joined: 05/04/15

Posts: 509

RE: Saftey warning
08/16/15 1:03 PM

Yeah not sure how fluid level in the reservior effects brake sensitivity? If brakes are bled correctly shouldn't have to be pumped up.
Maybe just choice of descriptive words that confuse.

Correction, If the pistons were pushed in to install the new pads you would pump the brakes until the piston seated the new pads against the disks. At that point you would check and adjust your fluid in the reservoir.


* Last updated by: david5525 on 8/16/2015 @ 1:08 PM *

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Grn14


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Location: Montana

Joined: 02/25/09

Posts: 15511

RE: Saftey warning
08/16/15 1:30 PM

I'm trying to see this in my mind how full that res was when Darryl did this.All the way...with NO air in there?


* Last updated by: Grn14 on 8/16/2015 @ 1:31 PM *

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darryle


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Location: ontario

Joined: 02/15/09

Posts: 1185

RE: Saftey warning
08/16/15 6:05 PM

David called it right, when I pushed in the Pistons to install my pads , the thicker pads caused my fluid to be above the upper level, my brakes required less lever imput until I bled off the fluid. My brakes are now nicely seated ,are the EBC s better then stock? New pads are always better then old,in Toronto Kawasaki want 84.99 a set for OEM.I paid 54.95 a set plus 16.00 $ shipping from petessuperbike in Quebec saved 50.00 after taxes 42 U.S. Dollars = 55cdn


* Last updated by: darryle on 8/16/2015 @ 6:09 PM *



2012 14R,full hindle Evolution ,vortex rear sets,BST's with ceramic bearings,HID's,hyper pro damper and custom map 205.3 hp/120.2 torque

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VicThing


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Joined: 07/17/14

Posts: 2398

RE: Saftey warning
08/16/15 7:21 PM

For the most part this issue doesn't make sense to me either. Too much fluid, yep makes sense if you've topped the reservoir off as the pads have worn. But I'd think overall if there was positive pressure it would just mean the brakes would be being applied all the time. I suppose if the rubber seal in the reservoir had actually compressed, even that slight bit of pressure I could see applying the brakes as the seal is pushing against the fluid. But causing super sensitive brakes? No that doesn't add up. What adds up if there was already a bit of pressure in the system, pulling the brake lever would add to that already existing pressure. Who knows, not there, I'm just rolling with it.

I ordered the same EBC pads today, spark plugs, air filter, and a couple other things.

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Hub


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Joined: 02/05/09

Posts: 13785

RE: Saftey warning
08/16/15 7:58 PM

Changed the fluid and bled the brakes... old pads had plenty of life left.

I had no spillover when I removed the cap, here is where I fill the res after bleeding and added more fluid. So, here is where I agree with Vic. Something is being broken-in on the drag? My brakes are sensitive or they are a softer compound and that's the diff?

installed new pads pumped up the brakes

Here is where I leave the cap on and just push the pistons back into the calipers. Still no weep out of the cap threads; I push those pistons in so I have max diaphragm collapse. Sounds like this is one drop short of leaking out the cap vent slot?

The new pads being thicker then the old raised the fluid level

Here is where the fluid is taking up piston space so you still have to compress fluid [mass] before the pistons move... so the pedal-lever feels spongy.

this caused my brakes to require next to nothing lever imput. Bled off a little fluid now everything is ok

This now has a caliper with less liquid to compress between piston and caliper bore. This now moves piston faster, so the lever-pedal now feels responsive.

Conclusion:
I did not mention having drag on the disc if I have forced pressure at the diaphragm? I am not complaining about brake squeaks or the initial drag glazed over the pads, no, this was not mentioned as if this would cause the discs to drag, but no?

I have no drag, figured out a perfect fluid to compress the diaphragm so no leak out the cap, but look ma, stoppies like no tomorrow. What are the odds no drag at the discs? Interesting, because the OP could [still] tell the difference something was up?



Tormenting the motorcycling community one post at a time

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darryle


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Location: ontario

Joined: 02/15/09

Posts: 1185

RE: Saftey warning
08/17/15 7:24 AM

Hub ,first I changed the fluid and bled the system at the calipers, a week later I changed the pads ,pushed in the Pistons to fit the pads than pumped up the lever.spun the front wheel by hand ,spun freely with very little drag.when I took the bike out the brakes were overly sensitive, less then half inch of lever imput would lock them up, checked the fluid it was above the upper line,so I bled off at each calipers 3 times til the level dropped just below the upper line.yesterday took the bike and they were ok .went thru a couple of tanks of gas with lots of light braking to break in.The brakes are working great.on the 07 I have done brakes multiple times without ever a problem



2012 14R,full hindle Evolution ,vortex rear sets,BST's with ceramic bearings,HID's,hyper pro damper and custom map 205.3 hp/120.2 torque

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Grn14


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Location: Montana

Joined: 02/25/09

Posts: 15511

RE: Saftey warning
08/17/15 7:36 AM

"I took the bike out the brakes were overly sensitive, less then half inch of lever imput would lock them up, checked the fluid it was above the upper line,so I bled off at each"...well...there ya go.Thicker pads...overfilled res...makes sense.The 'extra' fluid wasn't allowing the brake pistons to fully retract.With some brake heat,it would get even worse.Good thing you didn't just leave it like that.


* Last updated by: Grn14 on 8/17/2015 @ 7:40 AM *

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dehaile


dehaile's Gravatar

Location: East Texas

Joined: 02/03/15

Posts: 37

RE: Saftey warning
08/17/15 7:08 PM

What is the part number of the ebc pads you bought and where did you buy them?



2013 ZX14R ABS

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david5525


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Location: Kirkland WA PNW

Joined: 05/04/15

Posts: 509

RE: Saftey warning
08/17/15 10:05 PM

I fallow what he is saying but I also understand how the system works. The reservoir holds fluid to fill the master cylinder as needed. So if it is low or high it shouldn't effect the performance of the brakes. Now if you throw in pushing fluid back into the reservoir when you install new pads it could complicate a process if not done correctly ie remove the cap to allow excess fluid someplace to go. The cap has a vent but the vent is on the top side of the diaphragm meaning that the diaphragm can move up and down to compensate for varying fluid levels. It does not allow for fluid and pressure to escape from the fluid side of the diagram other than what the diaphragm can absorb. So if he pushed fluid and pressure back into his reservoir it could hold pressure until the brakes are applied? I just did a complete flush and bleed of front, rear brakes and clutch on my bike. Maybe the reservoir held backed up pressure from compressing the cylinders for new pads. When he applied the brakes the added pressure caused the added sensitivity?

Just trying to think through his situation.

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Hub


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Joined: 02/05/09

Posts: 13785

RE: Saftey warning
08/17/15 10:41 PM

if not done correctly ie remove the cap to allow excess fluid someplace to go.

Here's the deal.. OP did not mention oil went all over the place when cap removed. It still has room to breath.

the vent is on the top side of the diaphragm meaning that the diaphragm can move up and down to compensate for varying fluid levels.

And as compressed as it was, and as the fluid returned back up with new pads, and did the oil go all over the place out of the cap? No.. OP makes no mention of any spillage with cap on or removed. It was not over filled?

So if he pushed fluid and pressure back into his reservoir it could hold pressure until the brakes are applied?

That's my guess. Look how the bike was ridden, no complaint of now the bike drags as I just bled the brakes and they never dragged before? So with that not being mentioned, add the overflow with cap off or on, no, not dragging pads.

Maybe the reservoir held backed up pressure from compressing the cylinders for new pads. When he applied the brakes the added pressure caused the added sensitivity?

Bingo! I gotta try that.



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