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Old 01-29-2015, 03:53 PM   #1
cejnys OP
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Rusted Front Discs

Hey guys, I was just wandering whether this has happened to anyone? I am traveling through South America right now on my 2012 990 Adv with approx 37000 km on the clock. Recently I have noticed corrosion on my front discs, just on a couple of places. I am still on my first brake pads and they are used 40%. Also the discs are moving little bit back and forward when you grab them by hand.

The rear brake is absolutely fine.

I went to KTM Chile and they told me that warranty do not cover this part (I still have about 5 months of 2 years warranty on the bike).

Please can you let me know whether any of you have any experience with this.

Thanks, Rad

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Old 01-29-2015, 05:13 PM   #2
Qwik
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Floating discs so the movement isn't an issue. As for the rust, first I have seen. Spokes on the other hand......
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Old 01-30-2015, 12:12 AM   #3
TheMuffinMan
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The pitting I don't think is a big deal as long as braking performance feels the same. That being said if the pitting gets too extreme you'll want to replace the rotor as structural integrity could be affected.
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Old 01-30-2015, 05:37 AM   #4
Peanuts
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The pitting is from the brake pads, caused by parking the bike with wet discs. Salt water makes the effect far worse.
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Old 01-30-2015, 03:50 PM   #5
cejnys OP
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Thanks for your input guys; it seems to me pretty strange that this appears on an adventure bike. I am trying to take care of it as much as possible but when you travel around the world there is not much chance to do cleaning & drying of the bike etc.

I also have budget "hard working" bike Suzuki SV 650 I was using during winter on salty roads without much maintenance and parked outside. The front discs on my Suzuki are absolutely fine....cannot believe that this happened on KTM.

About 3 months ago in Colombia my front calipers stopped centralizing themselves and were constantly pushing on the discs and overheated them. I went to KTM shop and they rebuild the calipers under the warranty. Do you think that this may had an impact on the material property?

Rad
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Old 01-30-2015, 06:34 PM   #6
MKJ
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That probably was not a caliper issue but a rusted slider. It doesn't take much for the slider to become sticky. Clean, wipe a little antiseize on it and you're good to go. With the salt corrosion evident on your bike, look for sticky slider to happen again in near future. Save yourself some $$.

I replaced my front rotor at 14k miles. It was a bit sloppy on the pins.
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Old 01-31-2015, 01:56 AM   #7
Peanuts
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If you ever park the bike up wet, push the calipers into the disc with your knee. It is good to exercise the sliders and wipe the pistons clean from time to time and it allows the pads to stay clear of the disc and dry off.
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Old 02-11-2015, 02:18 PM   #8
cejnys OP
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Quote:
Originally Posted by Peanuts View Post
If you ever park the bike up wet, push the calipers into the disc with your knee. It is good to exercise the sliders and wipe the pistons clean from time to time and it allows the pads to stay clear of the disc and dry off.
thanks mate, really simple and effective
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Old 02-11-2015, 03:29 PM   #9
tunp
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Quote:
Originally Posted by Peanuts View Post
If you ever park the bike up wet, push the calipers into the disc with your knee. It is good to exercise the sliders and wipe the pistons clean from time to time and it allows the pads to stay clear of the disc and dry off.
just remember to tag or some other reminder to pump your brakes up when you get back on
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Old 02-11-2015, 04:38 PM   #10
MortimerSickle
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Quote:
Originally Posted by Peanuts View Post
If you ever park the bike up wet, push the calipers into the disc with your knee. It is good to exercise the sliders and wipe the pistons clean from time to time and it allows the pads to stay clear of the disc and dry off.
I'm not so sure about this one. To push the piston back without first cleaning off the dirt can carry the grit into the seals.

Once when changing pads, I found that the brakes were dragging. I found that the pistons were hanging up due to being dirty. I pulled the pads, and pumped the pistons out as far as I dared, then cleaned them. When I put it all back together it worked properly.
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