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Hello, first timer so be gentle! I Have a 2019 ZX10R KRT Performance and since new it has had a a brake judder. Very low speed, below 10mph like slowing to a stop with only single finger pressure, I get what I can only describe as a purr through the head end. Dealer has changed the pads, checked the discs and everything to ensure everything is tight around the headend. There’s no pissy cats installed. They are bemused. Hard to describe as it’s not in any way coming through the bar ends. Has anyone experienced anything like this on a new zx10r? Dealer is now in fob off mode so need to get real help. It doesn’t prevent the bike being fully enjoyed but as an engineer of sorts would like to know what’s going on. Thanks
 

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Has the dealer tested the rotor for runout with a dial indicator? If not, this should be done to eliminate runout as a possible cause. Even if they claim to have done this check, I would verify by doing it myself.

Does your bike have ABS? If so, try disabling ABS to see if the problem goes away.
 

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Has the dealer tested the rotor for runout with a dial indicator? If not, this should be done to eliminate runout as a possible cause. Even if they claim to have done this check, I would verify by doing it myself.

Does your bike have ABS? If so, try disabling ABS to see if the problem goes away.
DTI test done with no issues. It really doesn’t seem to be the usual brake judder from discs or pads. I haven’t tried switching off ABS so I will try that over the next few days. Thanks
 

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DTI test done with no issues. It really doesn’t seem to be the usual brake judder from discs or pads. I haven’t tried switching off ABS so I will try that over the next few days. Thanks
Can you give us an idea of the frequency of the judder? IE how many pulses per second at a given speed.
I assume the frequency corresponds directly to your speed, so what is frequency at say 10 MPH?
 

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Can you give us an idea of the frequency of the judder? IE how many pulses per second at a given speed.
I assume the frequency corresponds directly to your speed, so what is frequency at say 10 MPH?
Only happens at very low speed, literally as you come to a stop under minimal braking effort. Does not happen at any other speed or heavy breaking. Very rapid pulse for a second or two. It’s hard to describe it. My initial thought was electrical signal of some sort again dealer dismissed due to no fault codes on ABS or any other system. If I can get out on her over the next few days I will attempt to video it. Dealer mechanics hadn’t seen any like before! It’s going back for its first service end of the month so will be pressing for a deeper investigation
 

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This is a common complaint when dual front discs that have ventilation holes in them. At slowing speed, right before coming to a stop, it feels like very rapid ABS engagement, 2 or 3 times faster than ABS pulse though. Perfectly normal.
 
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