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brake disc from a std RMK work on a pro RMK?

Yes... the regular disk from a chaincase model will work on a pro chaincase model...but not on a belt drive.



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I don't think so. I thought the same thing. I bought a used Pro disc and tried to put on my standard. Did not fit. The pro uses a hollow jack shaft which is larger Dia than the solid standard. I have a cheap pro disc that didn't fit my standard I would sell you for the same price as a standard disc.

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The splined end is the same, unless someone sold you an IQ disc they should interchange. The only difference I've noticed is the Chain case sleds have an offset hub and large Outside diameter, than the QD sleds which have a straight hub and a smaller 7" outside diameter. I have a Disk off of a '12 PRO if you want it Sheetmetalfab
 
It could be that I got an IQ disc thinking it was a Pro. It is the wavy rotor with holes drilled in it. The spine is larger than on my standard rotor. I bought it on e-bay and was told it was a Pro rotor. At any rate, It didn't fit. So maybe I have an IQ rotor for sale. Ha

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It could be that I got an IQ disc thinking it was a Pro. It is the wavy rotor with holes drilled in it. The spine is larger than on my standard rotor. I bought it on e-bay and was told it was a Pro rotor. At any rate, It didn't fit. So maybe I have an IQ rotor for sale. Ha

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I likely saw the same disk on Fleabay, (They look very similar if you do not zoom in and verify 15 tooth spline) I have a brand new IQ disk just like that for sale also. I assumed they had not changed splines when I bought it and also learned the hard way.

But we are off topic here, SMF did you find a disc that works for you?
 
I personally have a PRO RMK disk on my standard Jackshaft and can also tell you the standard disk fits onto the Hollow pro shaft on my shelf (I'm too lazy to install the pro hollow shaft)....




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