Is this rotor done? (Pic)

[Adam R]

In my haste to get ready for a track day, I had to improvise and ended up using some older brake pads.  After less than 1mile test ride, my rotors looked like this.  



By the way, here is a pic of my bike after fitting the rear tail section:

[dgyver]

Either the old pads are worn bad and not touching the rotor completely or the rotor is worn where the pads do not touch completely. Either way, not a good thing. If you need a rotor, I have several lying around.

BTW...I like the rear cowl

[Adam R]

Darryl,

 That's actually the rotor that I bought from you around September or so.  I know the pads are messed up because the rotor was fine until I switched brake calipers (and pads).  My question though is: is the scoring on the rotor going to be a problem or will it wear down normally when I put new pads in the caliper?


Adam

[GRU]

i'm sure you can still use it...it doesn't look that bad...
when you change pads, check once in a while if the surcafe evens up


btw, the rear solo seat is awsome  

[dgyver]

Sorry, I forgot...damn CRS.

Did you change calipers as well? If so, it is possible that the pistons are dragging or worn. If the caliper is fine, then new pads will seat to the rotor surface. I doubt that the odd wear will create any problems. Looks like the surface is just being polished.
But, just  to be sure...How worn is the rotor? Can you actually feel a difference in the two areas of the rotor surface? Can you measure the thickness in the two areas?
Also, when installing new pads, you will want to scuff the rotor to remove any old pad material. I use a scotch bright pad.

[Adam R]

Yes I did switch brake calipers.  With my original brake caliper I found it impossible to retract the pistons and remove the pads, so I swapped it for another off my parts bike.  The pads do drag on the rotor when the bike is rolled in neutral.  There is a very slight difference between the "polished" section and the undamaged part - it's quite hard to tell by hand.  

How do I test and see if the caliper pistons are still good?  They expand and retract normally when in place and the bike stops with good stopping power.  I know the pads are somewhat torn up, I just didn't think it would do this much damage to the rotor.  

Adam

[GRU]

you just have to wait for the pads to seat propertly

[Blueknyt]

need alittle more then a mile to seat the pads, BTW, i run my rotors (changing pads when wornout) till they warp or get super thin.

[Jundie]

how much is super thin?
my rotor is 4.07 mm thick and I know that 4 mm is the minimum, but I'm low on funds and a new rotor costs around 200 euros... :x

[Jundie]

kick  

[The Buddha]

No idea about blueknyt but a new rotor is only 4.5 mm... the 4.07 will last a while... the other thing is I have ridden till it was under 3.5mm wihtout any ill effects... Get a group together and I will buy a foot of steel tubing and slice up 30-40 rotors... at under $50 a piece... Need 30-40 minimum orders.
Cool.
Srinath.

[Adam R]

No way that many people are going to order brake rotors, Srinath.