ABS kicking in & rotor hot after re-assembling rear wheel/axle

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slowdown
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ABS kicking in & rotor hot after re-assembling rear wheel/axle

Post by slowdown » Fri Jun 08, 2018 11:21 pm

I just got new tires and reinstalled the front and rear wheel again. I've done this job several times now. After reinstalled I went for a spin, literally around the block. I tried braking reasonably hard with front brakes -fine, rear brakes however had the ABS kick in wayyy before I feel like it normally should. When I got back home (30 seconds, literally around the block) my rear rotor was too hot to touch. Way hotter than my exhaust, and way, way hotter than the front 2 rotors, even though I tested both front and rear on that quick ride. (about 90 seconds total riding time). There wasn't even enough time for the engine temp to come up, and I could place my hand on the exhaust can for 10+ seconds without discomfort.


I took a look at the ABS sensor once everything had cooled down. There is minimal room between the ABS sensor and the ABS ring. As I spin the rear axle, I noticed that the distance between the ABS ring and sensor varies significantly throughout the ring, and it actually touches in some areas. The ABS ring is bowing in the middle between bolts. There are even marks on the ABS ring in the high spots where its making contact with the sensor during my ride. Despite my best efforts, I can not position the axle in such a way that the ABS ring is clear of the sensor once the caliper is mounted (not even bolted, just slid into place) over the rotor.

While I was waiting for replacement tires to come in the mail, I pulled the sprocket carrier off, and then pulled the axle and cleaned it and the rotor (with brake rotor, ABS ring still attached to axle).

As far as I know, the axle didn't sustain any damage while it was off. I can't think of any way in which the ABS rings would have been damaged, other than on my test ride? I attached some photos of the ABS ring and its deformed shape. Surely that's not normal, right??

I don't know if the problem is with the ABS ring, or if some other problem caused the ABS ring to be damaged... Really not sure where to go with this one.

PHOTOS:
https://imgur.com/a/2tza163

As always, I appreciate any insight. I learn a lot from this board.

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kevxtx
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Re: ABS kicking in & rotor hot after re-assembling rear wheel/axle

Post by kevxtx » Sat Jun 09, 2018 3:10 am

Just tap the ring with a hammer to straighten them, if the ring has touched the sensor & rubbed through it it may have damaged the sensor.

slowdown
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Re: ABS kicking in & rotor hot after re-assembling rear wheel/axle

Post by slowdown » Mon Jun 11, 2018 8:34 pm

Thank you Kev, I did that, took it for a spin and it seemed to behave better. Still would love to get ahold of a set of your rings for next time I have the bike apart.

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Re: ABS kicking in & rotor hot after re-assembling rear wheel/axle

Post by kevxtx » Wed Jun 13, 2018 10:01 am


Freakyfreak
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Re: ABS kicking in & rotor hot after re-assembling rear wheel/axle

Post by Freakyfreak » Fri Aug 31, 2018 3:18 pm

kevxtx wrote:
Wed Jun 13, 2018 10:01 am
Here you go:

https://www.ebay.com.au/itm/KTM-1290-SD ... SwfpVZFqcH
What do these rings of yours do Kev? I have SDR 2017 and I'm curious.
Thanks
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Re: ABS kicking in & rotor hot after re-assembling rear wheel/axle

Post by kevxtx » Sat Sep 01, 2018 1:28 am

They correct the over reading Speedo, I have not made any for the 2017 SD

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Re: ABS kicking in & rotor hot after re-assembling rear wheel/axle

Post by Freakyfreak » Wed Oct 17, 2018 2:31 pm

Does the 2017 SD have the over reading speed problem too?
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Re: ABS kicking in & rotor hot after re-assembling rear wheel/axle

Post by kevxtx » Wed Oct 17, 2018 9:00 pm

Freakyfreak wrote:
Wed Oct 17, 2018 2:31 pm
Does the 2017 SD have the over reading speed problem too?
Not as big as the 14 to 16's but is still over reads.

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Re: ABS kicking in & rotor hot after re-assembling rear wheel/axle

Post by Aussie Dave » Sat Oct 20, 2018 10:48 pm

Hi all, I have a 017 SDGT and the speedo error is under 2% with oem Angel GTs. Will vary a little with different tyre brands though.

I was reading the original post (damaged ABS sensor ring) and recalled a comment one of my KTM dealership mechanical guys said about another customer getting a tyre fitted while on a long tour interstate. The shop (not a KTM shop) re-fitted the wheel incorrectly (his words) and caused damage (not sure how/what damage as I have never taken my wheel off). Maybe there is a spacer or something that is tricky to position? I know the torque is pretty high and it's best to use the socket with the trick inner lug (to hold the socket on while leaning on the big handle)......... maybe they used some other tool or their air ratchet pressure was way off - anyways, be careful with your sensitive parts eh ;)
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