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Very Active Member
Turning Brake Rotors
Recently I asked if this was feasible in the belief that my warped fronts were going to come out of my pocket.
As it happened, BRP warranted mine and I bought new pads.
Came across this discussion today on BITOG where
the consensus is they can be turned at a reasonable cost.
This might interest those of you who do your own mechanicing:
http://www.bobistheoilguy.com/forums...Number=3008673
Two Wheelers from 1963-2011
Three Wheelers:
2011 RT(Red)
2014 RT(white)
2016 F3T(red)
2022 RT current ride(silver)
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2016 Slingshot
2018 Vanderhall
2019 Slingshot
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I've not looked at the specs for the rotors; perhaps you know this:
What thickness do they start off with?
What is the minimum allowable thickness?
Does the difference give you enough "meat" to work with?
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Turning rotors
Another problem with turning rotors is that depending on the amount of how warped they are determines the amount of metal removed.
Remove to much and you find yourself with a rotor that is no longer within spec's. the turning process also removes part or all of the hardness put there by the manufacturing heat treatment process
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Motorbike Professor
Originally Posted by Bob Denman
I've not looked at the specs for the rotors; perhaps you know this:
What thickness do they start off with?
What is the minimum allowable thickness?
Does the difference give you enough "meat" to work with?
Minimum disc thickness is 5.33 mm (0.21")
Maximum allowable disc warpage is 0.12 mm (0.005")
I do not know the original disc thickness.
-Scotty
2011 Spyder RTS-SM5 (mine)
2000 BMW R1100RTP, motorized tricycle & 23 vintage bikes
2011 RT-622 trailer, Aspen Sentry popup camper, custom motorcycle trailer to pull behind the Spyder
Mutant Trikes Forever!
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Very Active Member
Don't know..!!
the spec's but in my years in the motorcycle industry not many machine shops will turn motorcycle disks. They would at best clean up scratches. Chances of them failing warping or burning is to great. Many customers would replace the pads and let them wear into the grooves..I would replace them imho...
Gene and Ilana De Laney
Mt. Helix, California
2012 RS sm5
2012 RS sm5 , 998cc V-Twin 106hp DIY brake and park brake Classic Black
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Motorbike Professor
-Scotty
2011 Spyder RTS-SM5 (mine)
2000 BMW R1100RTP, motorized tricycle & 23 vintage bikes
2011 RT-622 trailer, Aspen Sentry popup camper, custom motorcycle trailer to pull behind the Spyder
Mutant Trikes Forever!
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Being a machinist,I would rather not try to turn the rotors.
Disc grinding would be a better method but not many places would do this without charging an arm and leg.
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Very Active Member
Originally Posted by NancysToy
Minimum disc thickness is 5.33 mm (0.21")
Maximum allowable disc warpage is 0.12 mm (0.005")
I do not know the original disc thickness.
Roger that. There's no way I'd even consider rotor turning on motorcycle/Spyder type solid rotors. And, that's without having looked at those specs you provided. Cripes new EBC rotors from Bajaron are certainly reasonable enough. Catastrophic failure of a thinned out brake rotor sounds like a very exciting, and non too satisfying way to end a ride to me.
2018 F3 S, BRP SS Grill, Spoiler, Attitude Bars, #1 linkage kit, Chopped R Fender, TBR S1R slip On exhaust, Elka Stage 2 R Shock, Shad saddlebags
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Active Member
I own a brake shop and have replaced and machined rotors for 40 years. They have min specs for a reason. They will not fail if you dont go below these numbers. The problem usually is once a rotor warps badly and you machine it, it goes back on the same vehicle, gets driven the same way it got driven before, and guess what, it warps again. Its hard to find a shop that can or will machine a rotor this small, and do it correctly. My advice, You paid alot of money for a very complicated machine, put on new rotors. You will be much happier in the long run.
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