flipping a warped brake rotor

[MILO]

not quite sure why, but my rr rotor is warped pretty bad. must have really overheated sometime. may even have bent from when my axle nuts came loose while on a poker run. i'm sure the axle slid right a little then and i'm sure the caliper would've held the rotor from going with it. it's cupped about 1/4", enough that the caliper mounting bracket is rubbing the rotor. i took it off and was going to flip it for the upcoming weekend, so the warp is out rather than into the caliper. i was gonna flip the pads also since they are worn to the shape of the rotor. is this a good idea or not? it's only gonna be for 1 weekend, i have a new rotor and pads coming in on Monday, of course a few days later than i had hoped, and i don't wanna miss the event this weeked cuz i have to work the next 5 weekends. any major concerns here or should it be fine?? i've never heard of anyone doing it before, but i may give it a shot.

[Shee-Male]

6 in one, half dozen in the other.

[ssanddemon]

Running a warped rotor causes the caliper to shift back and forth on the pins as it follows the warp. 1/4" is a LOT! I would try hard to find a new rotor before the event. Failing this, make sure there is good lube on the caliper slide pins and flip the rotor as necessary to prevent damage.

[MILO]

Running a warped rotor causes the caliper to shift back and forth on the pins as it follows the warp. 1/4" is a LOT! I would try hard to find a new rotor before the event. Failing this, make sure there is good lube on the caliper slide pins and flip the rotor as necessary to prevent damage.

389202[/snapback]

i don't think going back and forth will be much of an issue. it's consistent around the rotor. meaning, if you lay it on a flat surface, the center where it bolts on being flat, the outer edge is about 1/4" off of the surface the whole way around the rotor. not so much of a twisted spot, just the whole thing is cupped from the center out. but i'll lube it up good just to be on the safe side. thanks for the input!

[rzcolobanshee]

I had the same problem, It will just kill your pads very fast. Mine would only last for a day or 2. I would find a new rotor fast or bring lots of pads and try not to use your rear brake much

[rebelbanshee2]

put it on something hard and flat and hammer on it until its flat

[rzcolobanshee]

put it on something hard and flat and hammer on it until its flat

389427[/snapback]

LOL I tried that, it would just pop out the other direction, beat on it back and forth for ever to no avail

[ssanddemon]

Gotcha. I thought it was a runout issue. No big deal with a cup shape, just big pad wear.

[80overShee]

Could try drilling it out for in a 'cross drilled rotor' fashion. It may relieve enough outward stress that it straightens out. I believe a CBR 900 rotor is the exact same size and is a cross drilled rotor although the thickness is different. I checked against one and it matched. I plan to cross drill mine for heat dissapation and sand/mud clearning in the near future.

 

Drilling it out in numerous areas at a regular interval might just relieve enough outward stress that the cup of the rotor flattens out. Worth a try if you ask me. I wouldnt run on a cupped rotor at high speeds.....I'd rely on the fronts entirely (unless you have a wheelie comp)

[MILO]

it's like christmas in july ups guy just dropped off my parts, earlier than scheduled, which is really unusual, but i'm not complaining. new rotor and pads to throw on before the weekend. also new chain/sprockets.

 

i tried to straighten it out by pounding it flat too, and it didn't work to well. i was going to take it into work tonight and put it in the press,still might just out of curiosity. i tried flipping it and it really put a lot of pressure on the caliper and did drag quite a bit. if the press didn't do it i wasn't gonna risk further damage or brake failure, and sit out the weekend. but that's no longer an issue. but if i get it straightened, at least i'll have an emergency back up for the future.