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Offline trophied

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Re: Spinning the bobbins
« Reply #40 on: March 31, 2021, 11:03:07 pm »
Great tip digital! :028:
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Offline Ridefree

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Re: Spinning the bobbins
« Reply #41 on: April 09, 2021, 11:52:51 pm »
I am a believer.  I just spun the bobbins and my front wheel does not rub the pads and spins freely.  Prior to reading everyone’s comments I thought the discs were warped.  I can’t comment whether it should be normal maintenance but the results put a smile on the face.  Just took my first chatter free drive of the year. 

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Re: Spinning the bobbins
« Reply #42 on: April 09, 2021, 11:59:21 pm »
I think it would take a LOT of spinning the bobbins a few rotations at low speed while spraying any type of cleaner, or even water into them before enough wear would occur to be any kind of an issue.  It's not like this is a constant rotational, unlubricated part that's moving any time the bike is in motion.  Every couple of thousand miles seems to do it.
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Offline sin_tiger

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Re: Spinning the bobbins
« Reply #43 on: April 10, 2021, 11:22:40 am »
I made a little rubber bobbin for a battery screwdriver. There's enough grip with that normally, any tighter I'll do them by hand until free enough. Soapy water with a good rinse is usually enough. For a really persistent one, I'll rotate the disc to the bottom, use release fluid until it's free, flush both sides with brake cleaner or IPA before I move it.

I really notice the difference when they're free and the wear is more even than I've experienced in years gone by before I started paying attention to this.

Offline Trophyed-Up

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Re: Spinning the bobbins
« Reply #44 on: May 06, 2021, 12:41:36 am »
Don't know if anyone else has mentioned, I use a T-30 torx bit to spin the bobbins.  I still get pulsing.

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Re: Spinning the bobbins
« Reply #45 on: May 06, 2021, 07:59:14 am »
If the Bobbins are free and you still have pulsing of the front brakes,
try a few good hard braking applications ( in a safe environment of course ),
which may help.

Anecdotal reports suggest that deploying the Bobbin cleaning routine can reduce
the Pulsing felt in the front brakes, but of course there is no guarantee
that it will prevent the Discs from warping.  If they are warped,
no amount of Bobbin spinning and cleaning is going to fix that !

Cheers  :821:


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Re: Spinning the bobbins
« Reply #46 on: May 06, 2021, 09:13:44 am »
There may be a chance the rotors are warped but I don't see why.  The bike only has 16k miles and I don't think it's been abused.  Did a 2500 mile trip a couple weeks ago mostly on twisty roads.  I did some hard braking during that trip.  The pulsing has been about the same since I've owned the bike, about 8k miles.  I might throw on some new brake pads.  I had planned on waiting until next winter.  I haven't road tested since the latest bobbin spin. 

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Re: Spinning the bobbins
« Reply #47 on: May 06, 2021, 02:20:54 pm »
FYI at 21,000 miles our large SUV had a bad vibration in the front that was determined to be warped discs and I was advised that the mfr. did not cover warped discs, whereupon I informed the service manager that I had NEVER owned any vehicle that had warped discs in that little mileage and would take it up directly with the mfr.  He responded that rather than replace them they would at dealers expense turn them, but that was a one time shot and may not last.  Over 85,000 now and no more vibration in the front since.  It does happen, no matter the vehicle. 
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