Warped rotors at 8k? - Wrist Twisters
 
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post #1 of 10 Old 07-21-2014, 09:58 AM Thread Starter
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Warped rotors at 8k?

I've had my bike for about 3 weeks now, and as I've gotten adjusted to the bike I've begun noticing a wobble/pulsing/vibrating on braking (front only). This seems like a pretty obvious case of a warped rotor(s), but this has me kinda confused. The PO was a retired doctor who only put on touring miles and the bike only has 8k on the clock. Is there any precedent for this? Is there any sort of underlying cause I should look for?

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post #2 of 10 Old 07-21-2014, 10:24 AM
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Quote:
Originally Posted by EscapedLabRat View Post
I've had my bike for about 3 weeks now, and as I've gotten adjusted to the bike I've begun noticing a wobble/pulsing/vibrating on braking (front only). This seems like a pretty obvious case of a warped rotor(s), but this has me kinda confused. The PO was a retired doctor who only put on touring miles and the bike only has 8k on the clock. Is there any precedent for this? Is there any sort of underlying cause I should look for?
Yes, there might be dirt in your rotor carriers. See below vid & see if that helps. I did the same yesterday on my GSXR which was experiencing rotor pulsations & cleaning the carriers solved my problem.


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post #3 of 10 Old 07-21-2014, 10:42 AM Thread Starter
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Great information! I'll have to give this a shot when I get home. I'm really hoping that that is the problem as it'd save me a good chunk of $$. My concern now is that riding on them like this may have permanently warped the rotors.

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post #4 of 10 Old 07-21-2014, 10:50 AM
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Originally Posted by EscapedLabRat View Post
Great information! I'll have to give this a shot when I get home. I'm really hoping that that is the problem as it'd save me a good chunk of $$. My concern now is that riding on them like this may have permanently warped the rotors.
You will be fine, don't worry about it. I did a track day with the pulsations & the rotors are still OK.

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post #5 of 10 Old 07-22-2014, 08:29 AM Thread Starter
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Alright, so the carriers are definitely in need of cleaning, but I'm unable to do it how the video shows. The holes through the carriers are only 5mm, which is smaller than any hex bolt I'm able to get from my local hardware store. I could try a philips/slotted/small torx, but I'm 99% sure I won't be able to get enough torque on them without stripping. Any suggestions?

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post #6 of 10 Old 07-22-2014, 09:10 AM
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Originally Posted by EscapedLabRat View Post
Alright, so the carriers are definitely in need of cleaning, but I'm unable to do it how the video shows. The holes through the carriers are only 5mm, which is smaller than any hex bolt I'm able to get from my local hardware store. I could try a philips/slotted/small torx, but I'm 99% sure I won't be able to get enough torque on them without stripping. Any suggestions?
You do not need heavy duty nut/bolt combo. The GSXR rotors are the same way, I couldn't get a proper sized bolt through (TWSS) the rotor buttons. I used the thinnest I could find & then used some washers to create a larger surface area to clamp the buttons. Also you do not want to clamp on the buttons hard, just enough that you can spin them with the wrench or ratchet that you are using. While rotating, wash it down nicely with brake cleaner & you are good to go.

Go to Advance Auto or similar & see if they have any M4 sized nut bolt combo, that should be thin enough for you to work with.

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post #7 of 10 Old 07-22-2014, 02:31 PM Thread Starter
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Arshis, you're my favorite person of the day. Hunted down a bolt and got the carriers cleaned over lunch. The ride back to work was by far the smoothest I've had.

Thanks for the car parts store suggestion; I managed to find an M5 at Shucks that worked pretty well.

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post #8 of 10 Old 07-23-2014, 02:32 AM
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Very interesting.

I got some vibration from the brakes when braking hard, and supossed that the discs would be warped. I'll try this.

ROUNDED HEADLIGHTS LIBERATION FRONT

...
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^aaaaa
aa ^aaa avispaoencarretera.blogspot.com.es

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post #9 of 10 Old 08-04-2014, 05:50 AM
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OK, i've done what video says and it worked for me. Now i don't have that vibrations when braking.

2-3 of the buttons in each rotor were really stuck. I couldn't rotate any of the buttons with my fingers as he does in the video, but they're now smoother than they were.

And i used an electric screwdriver to do the operation... it's much faster.

ROUNDED HEADLIGHTS LIBERATION FRONT

...
aaaa
.. a ^aa
^aaaaa
aa ^aaa avispaoencarretera.blogspot.com.es

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post #10 of 10 Old 08-04-2014, 07:14 AM
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Good to know it worked out for you guys.

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