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  #1  
Old 27th May 2022
billeuze's Avatar
billeuze billeuze is offline
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Default What kind of brake disk to get

It looks like I need a new front brake disk before I put get my bike back on the road:



It’s a good opportunity to upgrade to the type of disk that works with modern pads (sintered?). What is the type of disk I would need for this upgrade and is it worth it?

This is on a ‘85 fork leg (single disk)
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Old 27th May 2022
Stray Cat Stray Cat is offline
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Get yourself a good floating rotor.
OEM Harley Rotors are good.
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Old 27th May 2022
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Hmm, if we already have floating calipers, is there an advantage to floating rotor compared to fixed rotor?

And I see pretty much all disks these days are stainless steel, is it stainless that’s needed to be compatible with scintered pads? Or do I have to be concerned about grade of stainless used?
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Old 27th May 2022
Stray Cat Stray Cat is offline
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reduced vibration...
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Old 27th May 2022
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More even pad wear at times........
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Old 28th May 2022
ryder rick ryder rick is offline
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The rotor floats for a different reason/function than the caliper floating.

A floating rotor pretty much keeps its shape, when a fixed mounted rotor expands it turns into a potato chip and splits due to thermal stresses.
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Old 28th May 2022
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This is an 11.5, 2.0 bore 3.25 bolt circle that fits a 9 spoke19” aluminum wheel. IIRC it’s off an’84 FXEF. Owner did most of one season and then had me swap everything to a dual disk wide glide.
I got the leftovers. Never did anything with it, most likely never will.

If you can use this, pay me shipping and I’ll drop it at the PO on my way to Tractor Supply. Give me a reason to go there .😜
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Old 28th May 2022
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Thanks Tim. I’m 99% sure that’s the exact same disk as what I have now. And since funds are tight, I’ll be happy to take it off your hands and maybe some other time I’ll upgrade.

The trouble is I live in canada and shipping can be quite expensive. I don’t know if you can check the gist of shipping online or something before going to the trouble of packing it up. I’ll pm you my address. If it costs more than $35 it probably not worth it.
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Old 28th May 2022
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On second thought I think I will not use Tim the Grim’s rotor. It’s the same as mine and Prone to the same cracking. I saw another identical rotor in the evo section with similar (but worse cracks). If floating disks will make it less of a potato chip and less likely to crack I’ll look for a cheap oem take-off.

Last edited by billeuze; 29th May 2022 at 04:34..
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You will not regret the investment.
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