Got a 15 zx6r, couple issues - ZX6R Forum
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post #1 of 16 Old 08-31-2019, 06:46 PM Thread Starter
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Got a 15 zx6r, couple issues

Hey fellas, new here and I got a couple questions. I picked up a 2015 zx6r this year to use as a track bike. I just went to my second track day this year with it and I got a couple issues. The bike has like 4k on it and an m4 exhaust thats it. First the front brakes suck. It was bad the first track day and I got braided lines and new brake fluid in there and hoped that would fix it, but it didnt. I mean if I grab a little bit of brake at 100mph it feels like the wheel is gonna wobble off. Im like shoot ill just engine brake this thing. Anyone else had a problem? I got the lines already, so its either the pads, the calipers or the rotors. What should I shoot for first?
The other issue is when im in a turn i need to roll on the throttle very gently as many of you should know. I try my damndest to roll the throttle as gently as I can but it always wants to slightly jerk when i go to put the throttle back on. I mean I've had 4 other bikes and never have I had this problem. I dont know if the throttle cable has a problem with it, it has a little bit of slack, or maybe if i should look at the throttle plates and see if they are sticking or something? But this is a problem. Any suggestions shoot em this way. And fyi I have the power on F and the traction control off. Thanks
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post #2 of 16 Old 08-31-2019, 09:35 PM
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My ‘12 has/had both those problems. I had the front end shake upon high-speed braking from day one, and didn’t solve it completely until swapping the brake mastercylinder, the lines, the rotors and finally the calipers and pads. I don’t have a ‘15, but what a PITA. I even tried rebuilding the oem calipers without success. I ended up with a 19x18 Brembo radial mastercylinder, oversized Braketech full-floating ductile iron rotors, R6 calipers, and SBS Dual Carbon pads before I was happy again.

I will say that you should double check your axle for correct assembly torque as that was something that contributed to my issue.

The throttle jerkiness I tried solving with a quarter-turn throttle tube, turning the idle speed up, and finally an ECU flash. Nothing completely solved the issue. I just tolerate what’s left of the jerkiness now.

Best of luck with your issues!
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post #3 of 16 Old 09-01-2019, 11:48 AM
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#1 - sounds like warped rotors. I had to buy new ones for mine when i bought it

#2 - as above, short fixes are raise idle speed and make sure you are in as low a gear as possible (higher engine revs) to minimise the effect. Root cause will be the change of exhaust without a remap / flash.
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post #4 of 16 Old 09-01-2019, 12:29 PM
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Check for warped rotors.

Ecu flash to disable decel cut helps

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post #5 of 16 Old 09-01-2019, 12:56 PM Thread Starter
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So as far as rotors go, should I stay oem or is aftermarket better? Opinions? Man I thought maybe the exhaust might have had something to do with it. To save me hours of searching online where can I get a flash for these bikes? And the quarter turn throttle sleeve? Anyone have a stock exhaust they wanna send me?
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post #6 of 16 Old 09-01-2019, 01:16 PM
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First measure to make sure they are warped. As far as options there's OEM, Galfer, Brembo, Braketech.

Swap out the tube for an r6 throttle tube. It's a direct fit.

I recommend Shnitz for the ecu flash. Only 100$

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post #7 of 16 Old 09-01-2019, 01:59 PM
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Quote:
Originally Posted by jd41 View Post
First measure to make sure they are warped.
Yep. You may “luck out” and just have warped rotor(s).
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post #8 of 16 Old 09-02-2019, 11:53 AM
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@turbotalon4 if you're interested I have a pair of straight 2014 zx6r OEM rotors for sale.

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post #9 of 16 Old 09-02-2019, 11:56 AM Thread Starter
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Ok i measured the rotors and they are both 4-5 thousands out. I guess I should start with the rotors and see where that gets me. What makes rotors warped? And I could get a flash and see if that helps. Also if I put a stock exhaust back on it would that remedy the jerkiness?
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post #10 of 16 Old 09-02-2019, 12:43 PM
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Disable fuel cut on decel. I have no jerkiness at all. Could be your throttle control too. I also have extra rotors lol. The stock master cylinder sucks, got a Brembo Corsa Corta
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post #11 of 16 Old 09-02-2019, 01:17 PM
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BTW, the exhaust shouldn't be an issue if its just a slip on and you have the cat hasn't been removed.
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post #12 of 16 Old 09-02-2019, 02:19 PM Thread Starter
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Ok, yeah the cat looks like its still there. So I could just get that schnitz ecu flash without having to add "adjust fuel tables to match exhaust" which is another $100?
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post #13 of 16 Old 09-02-2019, 03:16 PM
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Quote:
Originally Posted by turbotalon4 View Post
Ok, yeah the cat looks like its still there. So I could just get that schnitz ecu flash without having to add "adjust fuel tables to match exhaust" which is another $100?
It's a great bang for the buck for 75$. Throw in the exhaust servo delete and PAIR delete options and you won't need a servo buddy or block off plates. Fueling table mod is unnecessary.

I got mine flashed in 2015: https://www.zx6r.com/zx6r/64343-schn...ecu-flash.html

https://store.schnitzracing.com/schn...ki-zx6r-13-18/
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post #14 of 16 Old 09-02-2019, 04:00 PM
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post #15 of 16 Old 09-02-2019, 04:02 PM
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Quote:
Originally Posted by turbotalon4 View Post
Ok, yeah the cat looks like its still there. So I could just get that schnitz ecu flash without having to add "adjust fuel tables to match exhaust" which is another $100?
The “cat” is in the header pipes
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