Rear Brake Rotor Bolts came loose :( - KTM Forums: KTM Motorcycle Forum
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post #1 of 35 (permalink) Old 05-10-2019, 10:02 PM Thread Starter
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Rear Brake Rotor Bolts came loose :(

I have no idea how this could have happened. Bike is in the shop getting looked at. My mechanic was stunned as well.

Bolts backed out, and chewed up the Caliper bracket and the threads are wrecked on the rear axle, I tried tightening one but it just kept spinning. All the others are cocked over and the threads are probably wrecked on those too.

I'm Super bummed out now.
Check your rotor Bolts.

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post #2 of 35 (permalink) Old 05-10-2019, 10:32 PM
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..... those things are usually locked tighter than a fish's arrrrr.... thingy .

keep us in the loop eh..... that's a weird one for a bike that hasn't had rotor's changed (?).

My only guess (and it's a big guess) is that possibly the screws were over-tightened at the factory(?) and the alloy treads damaged/stripped - which allows movement over time and lets the screws work their way out......

PS I've not yet had the pleasure of removing my rear wheel so I don't know what's involved, but I have been told it is possible for a tyre fitter to install the wheel incorrectly..... whatever that means.... ? spacers? torque settings? etc. I wonder if a main wheel bearing has collapsed?

PPS I think they will be able to drill and helicoil new threads in the hub, and replace any other bits, so it should be fixable...... but the why did it happen - so it doesn't occur again - is most important.

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Last edited by DaveAu; 05-10-2019 at 10:39 PM.
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post #3 of 35 (permalink) Old 05-11-2019, 01:43 AM
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or someone doesnt like your nice bike .just saying.

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post #4 of 35 (permalink) Old 05-11-2019, 01:51 AM
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Really hard to imagine that happening - they are normally in with Locktite as well. Been messing with anyone's girlfriend recently???
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post #5 of 35 (permalink) Old 05-11-2019, 06:12 AM
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I will definitely check mine today.

Anyone who could screw up rear wheel removal/replacement on a SDGT had better give up motorcycles and stick to needlepoint. Two bolts, pull the silencer, two wire clips, one big nut and off. The drive and rear brake are untouched.
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post #6 of 35 (permalink) Old 05-11-2019, 06:21 AM
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I will definitely check mine today.

Anyone who could screw up rear wheel removal/replacement on a SDGT had better give up motorcycles and stick to needlepoint. Two bolts, pull the silencer, two wire clips, one big nut and off. The drive and rear brake are untouched.
Easiest rear tire R&R of any bike I've ever had.
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post #7 of 35 (permalink) Old 05-11-2019, 06:29 AM
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Easiest rear tire R&R of any bike I've ever had.
Front's not bad, either. Unlike my ZX-14, the fender doesn't have to be removed to get the wheel out from between the legs. Only hard part is searching for non-existent spacers.
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post #8 of 35 (permalink) Old 05-11-2019, 06:49 PM
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Originally Posted by pablo.gyds03 View Post
I have no idea how this could have happened. Bike is in the shop getting looked at. My mechanic was stunned as well.

Bolts backed out, and chewed up the Caliper bracket and the threads are wrecked on the rear axle, I tried tightening one but it just kept spinning. All the others are cocked over and the threads are probably wrecked on those too.

I'm Super bummed out now.
Check your rotor Bolts.

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that sucks...

Is the ABS ring "red" or is that an illusion?

There is no reason to touch the rear rotor bolt when swapping out tires. These are as others have posted "loctited" in - these don't back out on their own.

Did you have someone do maintenance on the rear of your bike recently?

Last edited by 2cati; 05-11-2019 at 07:02 PM.
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post #9 of 35 (permalink) Old 05-11-2019, 06:56 PM Thread Starter
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Originally Posted by DaveAu View Post
..... those things are usually locked tighter than a fish's arrrrr.... thingy .

keep us in the loop eh..... that's a weird one for a bike that hasn't had rotor's changed (?).

My only guess (and it's a big guess) is that possibly the screws were over-tightened at the factory(?) and the alloy treads damaged/stripped - which allows movement over time and lets the screws work their way out......

PS I've not yet had the pleasure of removing my rear wheel so I don't know what's involved, but I have been told it is possible for a tyre fitter to install the wheel incorrectly..... whatever that means.... ? spacers? torque settings? etc. I wonder if a main wheel bearing has collapsed?

PPS I think they will be able to drill and helicoil new threads in the hub, and replace any other bits, so it should be fixable...... but the why did it happen - so it doesn't occur again - is most important.
Cool I'll post up when I hear from the shop, rear wheel removal is essentially taking off the big nut and pulling the wheel off. But yeah I think you're right, I clean my wheels regularly probably once/twice a month and didn't notice anything loose then.

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post #10 of 35 (permalink) Old 05-11-2019, 06:57 PM Thread Starter
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or someone doesnt like your nice bike .just saying.
Lol na I get along with everyone haha

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